Difference between revisions of "Speech Technologies"

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Speech technologies are technologies or devices that can understand and/or produce human-like speech. The speech generation is useful in applications such as [[Speech synthesizers|text-to-speech]], [[Electrolarynx|electrolarynges]], [[Speech prostheses|speech prostheses]] or [[Intelligent Personal Assistants|intelligent personal assistants]]. The former three technologies are used as a medical devices for people, who lost their voice. Speech synthesizers are also incorporated into devices which helped visually disabled people. Intelligent Personal Assistants allow the users to use their devices hands-free by merely saying required commands, mostly in plain, natural speech.  
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[[File:How Siri works.jpg|500px|thumb]]
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Speech technologies are technologies or devices that can understand and/or produce human-like speech. The speech generation is useful in applications such as [[Speech synthesizers|text-to-speech]], [[Electrolarynx|electrolarynges]], [[Speech prostheses|speech prostheses]], or [[Intelligent Personal Assistants|intelligent personal assistants]]. The former three technologies are used as medical devices for people who have lost their voice. Speech synthesizers are also incorporated into devices that help visually disabled people. Intelligent personal assistants allow users to use their devices hands-free by merely saying required commands, mostly in plain, natural speech.  
  
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http://archive.is/YU9D
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These speech technologies deal with the voice, which is the dominant tool of interpersonal communication.<ref>LALWANI, Mona. Personal assistants are ushering in the age of AI at home. Engadget [online]. 2016, Oct 5. Available online at: https://www.engadget.com/2016/10/05/personal-assistants-google-home-ai/ (Retrieved 5th January, 2017).</ref> The importance of the voice was acknowledged also by the fact that 16th April was chosen as World Voice Day.<ref>SIEGEL-ITZKOVICH, Judy. Voice of the people. The Jerusalem Post [online]. 2015, Apr 26. Available online at: http://www.jpost.com/Israel-News/Health/Voice-of-the-people-399185 (Retrieved 17th January, 2017).</ref>
  
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http://www.speechtechmag.com/Articles/Editorial/Cover-Story/The-2015-State-of-the-Speech-Technology-Industry-Speech-Engine-101922.aspx
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== Main Characteristics ==
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Speech technologies can be divided between technologies used in medicine and technologies for commercial use. While the former group is represented primarily by [[Electrolarynx|electrolarynges]] and [[Speech prostheses|speech prostheses]], [[Intelligent Personal Assistants|intelligent personal assistants]] belong to the latter category. [[Speech synthesizers|Speech synthesis]] is used for both purposes. It is contained in intelligent personal assistants and GPS navigations, but also in systems for the visually impaired and speech synthesizers for people who have lost their voice.<ref name="taylor">TAYLOR, Paul. Text-to-Speech Synthes. University of Cambridge Department of Engineering [online]. 2014. Available online at: http://mi.eng.cam.ac.uk/~pat40/ttsbook_draft_2.pdf (Retrieved 2nd February, 2017).</ref> These technologies appear in two forms: devices or software, or a combination of both.  
  
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http://www.pcworld.com/article/243060/speech_recognition_through_the_decades_how_we_ended_up_with_siri.html
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=== Historical overview ===
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The first speaking machines were developed in antiquity and the Middle Ages. Nonetheless, they were not genuine speaking machines, since they depended on people speaking inside of them. The first genuine speaking machine was introduced by Hungarian civil servant and inventor Wolfgan von Kempelen. He described his speech synthesiser in the book ''Mechanismus der menschlichen Sprache nebst der Beschreibung seiner sprechenden Maschin'' [The Mechanism of Human Speech, with a Description of a Speaking Machine], published in 1791.<ref>DUDLEY, Homer, TARNOCZY, T. H. The speaking machine of Wolfgang von Kempelen. Journal of the Acoustical Society of America 22, 151-166. Doi:10.1121/1.1906583. Available online at: http://pubman.mpdl.mpg.de/pubman/item/escidoc:2316415:3/component/escidoc:2316414/Dudley_1950_Speaking_machine.pdf (Retrieved 2nd February, 2017).</ref>
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[[File:Seligmann - Billroth operating.jpg|240px|thumb|left|Theodore Billroth conducting a laryngectomy]]
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In the 19th century, researchers focused also on helping people who lost their voice or have a serious problem with their throat. Jan Nepomuk Czermak described the first laryngeal prosthesis in 1859. His attempt was followed by the introduction of various speech prostheses and artificial larynges.<ref name="history elecrolarynx"/> Later on, Austrian surgeon Theodore Billroth performed the first successful total extirpation of the larynx.<ref>KAZI, R. A., et al. Christian Albert Theodor Billroth: Master of surgery. Journal of postgraduate medicine, 2004, 50.1: 82. Available online at: https://tspace.library.utoronto.ca/bitstream/1807/2074/1/jp04025.pdf (Retrieved 25th February, 2016).</ref>
  
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16th April was chose as World Voice Day.<ref>SIEGEL-ITZKOVICH, Judy. Voice of the people. The Jerusalem Post [online]. 2015, Apr 26. Available online at: http://www.jpost.com/Israel-News/Health/Voice-of-the-people-399185 (Retrieved 17th January, 2017).</ref>
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The 20th century showed important breakthroughs in various fields of speech technologies. Speech synthesis started to be mechanized by the introduction of the first known electrical system, 'The Voder' in 1930.<ref name="voder"/> New techniques of voice synthesis also made the synthetic voice to sound more natural and lately to allow the preservation of the voices of patients who are losing their voice.<ref name="Designing High-Coverage">JŮZOVÁ, M., TIHELKA, D., MATOUŠEK, J. Designing High-Coverage Multi-level Text Corpus for Non-professional-voice Conservation. In: Speech and Computer. Volume 9811 of the series Lecture Notes in Computer Science. Cham: Springer, 2016, pp 207-215. Doi: 10.1007/978-3-319-43958-7_24 Available online at: http://link.springer.com/chapter/10.1007/978-3-319-43958-7_24 (Retrieved 16th February, 2017).</ref> The first electrolarynges were introduced in 1942 by G. M. Wright.<ref name="history elecrolarynx"/> Surprisingly, the first tracheoesophageal voice prosthesis was not developed by a professional, but it was conducted by a patient using a red-hot ice pick in 1931. Surgeons, however, were unable to replicate this procedure.<ref>BLOM, Eric D. Current Status of Voice Restoration Following Total Laryngectomy. Oncology [online]. 2000, Jun 1. Available online at: http://www.cancernetwork.com/head-neck-cancer/current-status-voice-restoration-following-total-laryngectomy (Retrieved 19th January, 2017).</ref> Therefore, it was abandoned until Erwin Mozolewski presented his tracheoesophageal voice prosthesis.<ref>MOZOLEWSKI, Erwin S., et al. "Arytenoid vocal shunt in laryngectomized patients." The Laryngoscope 85.5 (1975): 853-861.</ref>  
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== Main characteristics ==
 
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<!-- This section should describe the technology in more detail. Here should be information about the used hardware and software, available features, chemical composition and so on, provided that they are available. Second half of this section should offer information on history of the technology. When it was created, unveiled, developed, announced to the public or when it was available to purchase. Anything related to the technology that can be pinpointed to a certain date should be in this section together with relevant commentary.-->
 
  
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http://www.speechatsri.com/products/eduspeak.shtml
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In the middle of the 20th century, the first speech recognition system was introduced. The first system was 'Audrey' which was able to recognise digits spoken by a single voice. It was followed by IBM's 'Shoebox' presented at the 1962 World's Fair. It was able to recognise 16 English words. Another important system for voice recognition was 'Harpy', which was developed by the U.S. Department of Defense between 1971 and 1976. It could recognise 1,011 words, similar to the capabilities of a 3 year-old child.<ref name="Siri history"/> Apple presented the idea of an intelligent personal assistant in 1987. It was entitled Knowledge Navigator, but the advertised product was never developed.<ref>DUBBERLY, Hugh. The Making of Knowledge Navigator. DDO [online]. 2007, Mar 30. Available online at: http://www.dubberly.com/articles/the-making-of-knowledge-navigator.html (Retrieved 5th January, 2017).</ref> The first publicly available personal assistant was [[Apple Siri|Siri]], introduced by Apple in 2010.<ref name="Siri"/> It was followed by the similar products of other companies as [[Amazon Alexa|Alexa]], [[Google Now]], and [[Microsoft Cortana|Cortana]].<ref name="copycat">POGUE, David. The Problem with Tech Copycats. Scientific American [online].315(5), p. 23-23.  Available online at: http://ve5kj6kj8s.scholar.serialssolutions.com/?sid=google&auinit=D&aulast=Pogue&atitle=The+Problem+with+Tech+Copycats&id=doi:10.1038/scientificamerican1116-23&title=Scientific+American&volume=315&issue=5&date=2016&spage=23&issn=0036-8733 (Retrieved 19th December, 2016).</ref> Siri was software that was contained in iPhones. In 2014, Amazon.com presented its first intelligent personal assistant device [[Amazon Echo]], which contains [[Amazon Alexa|Alexa]].<ref name="echo"/> Its introduction also provoked the introduction of similar devices such as [[Google Home]], [[Apple HomeKit]], [[Lenovo Smart Assistant]], etc.<ref name="copycat"/>
  
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=== Purpose ===
 
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=== Company & People ===
 
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== Important Dates ==
 
== Important Dates ==
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<!-- A list of important dates in the development and history of the technology. Use the information provided in the second half of the Main characteristics section and make it into a short, unnumbered list. -->
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* 1769: Wolfgang von Kempelen developed the first genuine speech synthesizer<ref name="his.synth">WOODFORD, Chris. Speech synthesizers. EXPLAINTHATSTUFF [online]. 2017, Jan 21. Available online at: http://www.explainthatstuff.com/how-speech-synthesis-works.html (Retrieved 16th February, 2017).</ref>
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* 1859: the first pneumatic laryngeal prosthesis was introduced by Jan Nepomuk Czermak<ref name="history elecrolarynx">KEITH, Robert L., SHANKS, James, Laryngectomee Rehabilitation: Past and Present. In: Speech and Language: Advances in Basic research and Practice. New York: Academic Press, 1983. Available online at: https://books.google.cz/books?id=0C60BQAAQBAJ&pg=PA126&lpg=PA126&dq=Cooper-Rand+electrolarynx&source=bl&ots=or27eudDf2&sig=22heagC08Fpk57qGILvufHxwCyM&hl=cs&sa=X&ved=0ahUKEwi1--bt3r7RAhWGuxQKHbrFCC04ChDoAQgdMAE#v=onepage&q=Cooper-Rand%20electrolarynx&f=false (Retrieved 13th January, 2017).</ref>
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* 1873: Billroth conducted the first successful total laryngectomy<ref name="history elecrolarynx"/>
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* 1931: the first laryngeal puncture was conducted by a patient<ref>BLOM, Eric D. Current Status of Voice Restoration Following Total Laryngectomy. Oncology [online]. 2000, Jun 1. Available online at: http://www.cancernetwork.com/head-neck-cancer/current-status-voice-restoration-following-total-laryngectomy (Retrieved 19th January, 2017).</ref>
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* 1937: the speech synthesizer 'The Voder' was unveiled<ref name="voder">DUNCAN. Klatt’s Last Tapes: A History of Speech Synthesisers. Communication Aids [online]. 2013, Aug 10. Available online at: http://communicationaids.info/history-speech-synthesisers (Retrieved 2nd February, 2017).</ref>
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* 1942: Wright developed the first electrolarynx 'Sonovox'<ref name="liu">LIU, Hanjun, NG, Manwa L. Electrolarynx in voice rehabilitation. Auris Nasus Larynx, 2007, 34.3: 327-332.</ref>
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* 1952: Bell Laboratories presented 'Audrey'<ref name="Siri history">PINOLA, Melanie. Speech Recognition Through the Decades: How We Ended Up With Siri. PCWorld [online]. 2011, Nov 2. Available online at: http://www.pcworld.com/article/243060/speech_recognition_through_the_decades_how_we_ended_up_with_siri.html (Retrieved 28th February, 2017).</ref>
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* 1972: Erwin Mozolewski introduced a tracheoesophageal voice prosthesis<ref>TARNOWSKA, Czesława. Wspomnienie o profesorze Erwinie Mozolewskim. Pomorski Uniwersytet Medyczny w Szczecinie [online]. Available online at: https://www.pum.edu.pl/__data/assets/file/0009/14868/Wspomnienie_o_profesorze_Erwin_7517.pdf (Retrieved 19th January, 2017).</ref>
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* 1976: 'Harpy' was developed<ref name="Siri history"/>
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* 1987: the Apple Knowledge Navigator was presented<ref>DigiBarn Computer Museum. The Knowledge Navigator concept piece by Apple Computer (1987). DigiBarn Computer Museum [online]. Available online at: http://www.digibarn.com/collections/movies/knowledge-navigator.html (Retrieved 5th January, 2017).</ref>
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* 4th February 2010: Siri Inc. unveiled Siri, which was later acquired by Apple<ref name="Siri">HARRISON, Natalie and BREWER, Teresa. Apple Launches iPhone 4S, iOS 5 & iCloud. Apple [online]. 2011. Oct 4. Available online at: http://www.apple.com/pr/library/2011/10/04Apple-Launches-iPhone-4S-iOS-5-iCloud.html (Retrieved 16th December, 2016).</ref>
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* 6th November 2014: Amazon.com introduced Amazon Echo<ref name="echo"> WELCH, Chris. Amazon just surprised everyone with a crazy speaker that talks to you. The Verge [online]. 2014, Nov 6. Available online at: http://www.theverge.com/2014/11/6/7167793/amazon-echo-speaker-announced (Retrieved 20th December, 2016).</ref>
  
 
== Enhancement/Therapy/Treatment ==
 
== Enhancement/Therapy/Treatment ==
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<!-- Describe in detail whether the technology aims to enhance human cognition, i.e. to improve human abilities beyond what is considered normal, and/or if it is also applicable as a form of treatment or therapy, i.e. it can serve to cure patients or restore abilities that do not perform as they would in a healthy person -->
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http://www.pcadvisor.co.uk/feature/software/how-digital-assistants-are-replacing-our-brains-3530140/
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===Therapy & Treatment===
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[[File:Stephen-Hawking.jpg|400px|thumb|Stephen Hawking, the most renowned user of speech synthesis]]
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The purpose of [[Speech prostheses|speech prostheses]] and [[Electrolarynx|electrolarynges]] is to return the ability to speak to patients who have undergone total laryngectomy or lost their voice in some other way.<ref name="brown">BROWN, Dale H. et al. Postlaryngectomy Voice Rehabilitation: State of the Art at the Millennium, World Journal of Surgery [online]. 2003, 14 May.  DOI: 10.1007/s00268-003-7107-4 Available online at: http://link.springer.com/article/10.1007/s00268-003-7107-4 (Retrieved 16th January, 2017).</ref> Certain [[Speech synthesizers|speech synthesizers]] could also be used for this purpose, even though speech synthesis is used also in non-therapeutic applications.<ref name="taylor"/> Patients could also achieve oesophageal speech, but it is difficult to learn, and certain patients are not able to communicate this way.<ref>GARDNER, Warren H., HARRIS, Harold E. Aids and Devices for Laryngectomees.  Arch Otolaryngol 73(2) [online]. 1961: 145-152. Doi: 10.1001/archotol.1961.00740020151003 Available online at: http://jamanetwork.com/journals/jamaotolaryngology/article-abstract/1766151 (Retrieved 17th January, 2017).</ref> Each technique of voice restoration has its pros and cons. The electrolarynx's speech sounds mechanical and depends on the mechanical device, but it is easy to achieve, and it is used when any other methods have failed.<ref name="brown"/> Speech prostheses have to be installed during surgery, the prosthesis has to be removed periodically<ref name="Serra">SERRA, A. et al. Post-laryngectomy voice rehabilitation with voice prosthesis: 15 years experience of the ENT Clinic of University of Catania. ACTA otorhinolaryngologica italica [online]. 2015; 35(6): 412-419. Doi: 10.14639/0392-100X-680 Available online at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4755057/ (Retrieved 23rd January, 2017).</ref>, and the pitch is considerably low for women,<ref name="difficulty">TEN HALLERS, E. J. O. et al. Difficulties in the fixation of prostheses for voice rehabilitation after laryngectomy. Acta Oto-Laryngologica [online]. 2009, Jul 8. Doi: 10.1080/00016480510031506 Available online at: http://www.tandfonline.com/doi/abs/10.1080/00016480510031506 (Retrieved 23rd January, 2017).</ref> but in comparison to electrolarynx, prostheses have certain pitch control and are more intelligible.<ref name="Serra"/> Speech synthesis could preserve a patient's voice, but it depends on the voice conservation, which could be challenging.<ref name="Designing High-Coverage"/>
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Customers' reviews suggest that [[Intelligent Personal Assistants|intelligent personal assistants]] could be helpful for the elderly and disabled. These devices could make them more independent due to control of the environment which they provide.<ref>Patrickometry. Alexa is a Revolution for my Disabled Family Member. Amazon [online]. 2015, Sep 6. Available online at: https://www.amazon.com/Amazon-SK705DI-Echo/product-reviews/B00X4WHP5E (Retrieved 21st December, 2016).</ref> Customers also claim that the devices could call for help when elderly or disabled people have an accident,<ref>Alex S. Already very practical for overcoming disability issues. Amazon [online]. 2015, Jun 19. Available online at: https://www.amazon.com/review/RTRDKUJDZCO4B/ref=cm_cr_dp_title?ie=UTF8&ASIN=B00X4WHP5E&channel=detail-glance&nodeID=9818047011&store=amazon-home&tag (Retrieved 21st December, 2016).</ref> though, this claim has not yet been supported by research.
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Speech synthesis is used in various applications and devices for the blind or people with vision impairments. It enables them to read content from a screen.<ref name="Designing High-Coverage"/> Speaking devices used as toys or GPS systems also benefit from speech synthesis. They are also used in call centres, where they handle common tasks of customers.<ref name="taylor"/>
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===Enhancement===
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[[Intelligent Personal Assistants|Intelligent personal assistants]] (IPA) are meant to help users deal with several tasks, organise information, and provide help with complex tasks. Siri, the first IPA, was originally developed to solve military tasks<ref>BOSKER, Blanca. SIRI RISING: The Inside Story Of Siri’s Origins — And Why She Could Overshadow The iPhone. The Huffington Post [online]. 2013, Jan 24. Available online at:  http://www.huffingtonpost.com/2013/01/22/siri-do-engine-apple-iphone_n_2499165.html (Retrieved 15th December, 2016).</ref>. However, IPAs are also currently used in medical care,<ref>KOMNINOS, Andreas. STAMOU, Sofia. HealthPal: An Intelligent Personal Medical Assistant for Supporting the Self-Monitoring of Healthcare in the Ageing Society. Research Gate [online]. Available online at: https://www.researchgate.net/publication/228643857_HealthPal_an_intelligent_personal_medical_assistant_for_supporting_the_self-monitoring_of_healthcare_in_the_ageing_society (Retrieved 6th January, 2017).</ref> business, transportation,<ref>MIT Technology Review Custom, PwC. AI Drives Better Business Decisions. MIT Technology Review [online]. 2016, Jun 20.  Available online at: https://www.technologyreview.com/s/601732/ai-drives-better-business-decisions/ (Retrieved 6th January, 2017).</ref> and shopping<ref>WINARSKY, Norman and MARK, William. The Future Of The Virtual Personal Assistant. TechCrunch [online]. Mar 25, 2012 Available online at: https://techcrunch.com/2012/03/25/the-future-of-the-virtual-personal-assistant/ (Retrieved 16th December, 2016).</ref>. IPAs could also control the smart devices which are in the household of their users, even though certain brands support only certain IPAs.<ref name="IoT">THIBODEAUX, Rose. The Ultimate Guide to Smart Home Compatibility. Home Alarm Report [online]. 2017, Jan 4. Available online at: http://homealarmreport.com/ultimate-guide-smart-home-compatibility/ (Retrieved 11th January, 2017).</ref> IPAs or speech synthesizers could help their users with the acquisition of foreign language.<ref>GOKSEL-CANBEK,  N., MUTLU,  M. E. On  the  track  of  Artificial  Intelligence:  Learning  with  Intelligent  Personal Assistants. International Journal of Human Sciences, 13(1), 2016, p. 592-601. Doi: 10.14687/ijhs.v13i1.3549 Available online at: https://www.j-humansciences.com/ojs/index.php/IJHS/article/view/3549/1661 (Retrieved 6th January, 2017).</ref><ref>MOLDEN, Martin. Employing Apple's Siri to practice pronunciation: A preliminary study on Arabic speakers. TESOL Working Paper Series 13, p. 2-17. Available online at: http://www.hpu.edu/CHSS/English/TESOL/ProfessionalDevelopment/2015_TWP13/02Molden2015Siri.pdf (Retrieved 19th December, 2016).</ref><ref>CHINNERY, George M. EMERGING TECHNOLOGIES Going to the MALL: Mobile Assisted Language Learning. Language Learning & Technology [online], 10(1), (2016): 9-16. Available online at: http://archive.is/YU9D. (Retrieved 28th February, 2017).</ref>
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== Ethical & Health Issues ==
 
== Ethical & Health Issues ==
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http://www.techadvisor.co.uk/opinion/internet/no-one-cares-about-privacy/
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===Efficiency===
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The issue with which every speech technology struggles, is efficiency and quality of performance. As was mentioned in a previous section, the quality of the voice produced by the electrolarynx is low, even though newly introduced electrolarynges contain pitch control.<ref name="liu"/> Although the voice produced by voice prostheses and speech synthesizers sounds better, it is still not natural.<ref name="taylor"/><ref name="difficulty"/><ref>VAN DER TORN, M. A sound-producing voice prosthesis. Amsterdam, 2005. Dissertation thesis. Vrije Universiteit.</ref> Finally, intelligent personal assistants struggle with the recognition of different accents,<ref>DART, Tom. Y'all have a Texas accent? Siri (and the world) might be slowly killing it. The Guardian [online]. 2016, Feb 10. Available online at: https://www.theguardian.com/technology/2016/feb/10/texas-regional-accent-siri-apple-voice-recognition-technology (Retrieved 28th February, 2017).</ref> are only as efficient as the applications with they are compatible, and run only on their home device at the moment.<ref>CORBYN, Zoë. Meet Viv: the AI that wants to read your mind and run your life. The Guardian [online]. 2016, Jan 31. Available online at: https://www.theguardian.com/technology/2016/jan/31/viv-artificial-intelligence-wants-to-run-your-life-siri-personal-assistants (Retrieved 10th January, 2017).</ref>
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[[File:Cortana.jpg|500px|thumb|Microsoft's Cortana, intelligent personal assistant]]
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===Privacy issues===
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The main issue linked with [[Intelligent Personal Assistants|IPAs]] is data collection. IPAs collect various data about their users as personal contacts, location, and preferences, etc., in order to provide adequate service. Moreover, their speech synthesis is not processed at the device but in the remote centre.<ref>KENNY, Gavin. I Know Everything About You! The Rise of the Intelligent Personal Assistant. Security Intelligence [online]. 2015, Aug 12. Available online at: https://securityintelligence.com/i-know-everything-about-you-the-rise-of-the-intelligent-personal-assistant/ (Retrieved 9th January, 2017).</ref> These data are valuable for the companies, that collect them and can be used for their commercial purposes.<ref> EGAN, Matt. No one cares about privacy. TechAdvisor [online]. 2014, Mar 24. Available online at: http://www.techadvisor.co.uk/opinion/internet/no-one-cares-about-privacy/ (Retrieved 28th February, 2017).</ref> The data could also be misused, if they are stolen by a third party.<ref>COHEN, P., CHEYER, A., HOROVITZ, E., EL KALIOUBY, R. & WHITTAKER, S. A Future for Personal Assistants. ACM CHI 2016: Panel Session, San Jose, May 7-12, 2016. Available online at: http://www.adam.cheyer.com/papers/chi16.pdf (Retrieved 9th January, 2017).</ref> The majority of IPAs listen to all of the communication which happens around them. Although it could be switched off, this feature is not always used, since it is inconvenient.<ref>CARROLL, Rory. Goodbye privacy, hello 'Alexa': Amazon Echo, the home robot who hears it all. The Guardian [online]. 2015, Nov 21. Available online at: https://www.theguardian.com/technology/2015/nov/21/amazon-echo-alexa-home-robot-privacy-cloud (Retrieved 10th January, 2017).</ref> The issue applies to some extent also with regard to speech synthesizers, especially on apps, which provide speech synthesis.<ref> WebWhispers.org. Text to speech apps for Phones and Pads. WebWhispers.org [online]. 2017. Available online at: http://www.webwhispers.org/library/TexttoSpeechApps.asp (Retrieved 16th February, 2017).</ref>
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===Naturalness===
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The problem of 'uncanny valley' could also be applied on within speech technologies. Jan Romportl claims that the effect of uncanny valley have caused the more natural-sounding voices produced by current speech synthesizers to not have been entirely accepted.<ref>ROMPORTL, Jan. Speech Synthesis and Uncanny Valley. In: Text, Speech, and Dialogue. Cham: Springer, 2014, p. 595-602. Doi: 10.1007/978-3-319-10816-2_72 Available online at: http://link.springer.com/chapter/10.1007/978-3-319-10816-2_72 (Retrieved 2nd February, 2017).</ref> In addition, the [[Gatebox]] IPA caused a controversy and was deemed to be creepy by certain journalists due to the fact that it tends to be considerably personal.<ref>ONES, Rhett. Virtual Assistant Lets You Imprison Your Anime Girlfriend and Feel Loved. Gizmodo [online]. 2016, Dec 17. Available online at: http://gizmodo.com/virtual-assistant-lets-you-imprison-your-anime-girlfrie-1790234598 (Retrieved 22nd December, 2016).</ref> Nicholas Brazzi also warns that the personal connection to IPAs could have a negative effect on decision making and could be potentially dangerous and life-threatening.<ref>BRAZZI, Nicholas. Don't call it "she"​. It's a computer, not a person. LinkedIn [online]. 2017, Jan 12. Available online at: https://www.linkedin.com/pulse/dont-call-she-its-computer-person-nicholas-brazzi (Retrieved 13th January, 2017).</ref>
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===Post-surgery state===
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The use of certain types of [[Electrolarynx|electrolarynges]] and [[Speech synthesizers|speech synthesizers]] could be limited after surgery due to the post-surgery state of the patient. Patients could be weak<ref> Advance Health Network. Industry News: Cooper-Rand Electronic Speech Prosthesis. Advance Health Network [online]. Available online at: http://speech-language-pathology-audiology.advanceweb.com/Article/Cooper-Rand-Electronic-Speech-Prosthesis.aspx (Retrieved 13th January, 2017).</ref> and the tissue in his or her neck could be harmed by surgery or radiation. While certain conditions could change in a few days after surgery, if the tissue is scarred or radiated, the patient could not use a neck-type electrolarynx.<ref> SHUTE, Brian. There's Nothing Like the Sweet Spot: Placement of the Artificial Larynx. DrShute.com [online]. 1997, Oct. Available online at: http://www.drshute.com/archives/2004/08/theres_nothing.html (Retrieved 16th January, 2017).</ref>
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===Infection===
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Intra-oral electrolarynges tend to be corrupted by infection, and therefore patients have to care for them carefully.<ref>MOFFET, Bethann, PINDZOLA, Rebekah H. Acustic Properties of Artifical Larynx Speech. ASHA [online]. 1988. Available online at: http://www.asha.org/uploadedFiles/asha/publications/cicsd/1988AcousticProperties.pdf (Retrieved 16th January, 2017).</ref> The appropriate hygiene is also necessary in the handling of speech prostheses.<ref>BROOK, Itzhak. The Laryngectomee Guide. American Academy of Otolaryngology–Head and Neck Surgery [online]. 2015. Available online at: https://www.entnet.org/sites/default/files/LaryngectomeeGuide.pdf (Retrieved 19th January, 2017).</ref>
  
 
== Public & Media Impact and Presentation ==
 
== Public & Media Impact and Presentation ==
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<!-- Provide information about the impact the technology had on the public and how the technology is presented in the media or literature. If there was anything in the news regarding this technology, it should be noted and properly cited here. -->
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[[File:ElectrolarynxGuy.jpg|thumb|Electrolarynx Guy from ''My Name Is Earl'']]
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Speech technologies feature in several sci-fi films, series, books, and video games. One of the best known is HAL from Stanley Kubrick's ''2001: A Space Odyssey''. It is a computer that turned to endanger the staff of the spaceship where installed. When it is switched off he sang ''Daisy Bell''. Arthur C. Clark, the author of the plot, was inspired by his experience with a real computer that was able to sing this song.<ref>MCLELLAN, Charles. How we learned to talk to computers, and how they learned to answer back. TechRepublic [online]. Available online at: http://www.techrepublic.com/article/how-we-learned-to-talk-to-computers/ (Retrieved 3rd March, 2017).</ref>
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Several speech technologies, which are already available, also appear on screen. An electrolarynx was used by characters in ''Mad Max''<ref>The Mad Max Wiki. Charlie. The Mad Max Wiki [online]. Available online at: http://madmax.wikia.com/wiki/Charlie (Retrieved 17th January, 2017).</ref>, ''South Park'',<ref>South Park Wiki. Ned Gerblansky. South Park Wiki [online]. Available online at: http://southpark.wikia.com/wiki/Ned_Gerblansky (Retrieved 17th January, 2017).</ref> and ''My Name Is Earl''<ref>My Name Is Earl Wiki. Electrolarynx Guy. My Name Is Earl Wiki [online]. Available online at: http://mynameisearl.wikia.com/wiki/Electrolarynx_Guy (Retrieved 17th January, 2017).</ref>. Siri, an Apple's IPA, appeared in ''The Big Bang Theory''<ref>RAWSON, Chris. Siri guest stars on CBS's Big Bang Theory. Engadget [online]. 2012, Jan 30. Available online at: https://www.engadget.com/2012/01/30/siri-guest-stars-on-cbss-big-bang-theory/ (Retrieved 10th January, 2017).</ref>, where one of the main characters falls in love with her, and was parodied in ''The Simpsons''<ref>WEHNER, Mike. The Simpsons pokes fun at Siri. Engadget [online]. 2013, Nov 4. Available online at: https://www.engadget.com/2013/11/04/the-simpsons-pokes-fun-at-siri/ (Retrieved 10th January, 2017).</ref>.
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The most renowned user of speech synthesis might be Stephen Hawking, British physicist and cosmologist. Hawking lost his voice due to a tracheotomy that he underwent in 1985. He uses a system that Intel developed for him.<ref>MEDEIROS, Joao. How Intel Gave Stephen Hawking a Voice. Wired [online]. 2015, Jan 13. Available online at: https://www.wired.com/2015/01/intel-gave-stephen-hawking-voice/ (Retrieved 3rd March, 2017).</ref> Intel released this software, which is entitled ACAT, for free. It is meant to help patients with the same diagnosis as Hawking has, amyotrophic lateral sclerosis, as well as other disabled people.<ref>MCHUGH, Molly. You Can Now Use Stephen Hawking’s Speech Software for Free. Wired [online]. 2015, Aug 18. Available online at: https://www.wired.com/2015/08/stephen-hawking-software-open-source/ (Retrieved 3rd March, 2017).</ref>
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Loss of voice is caused by total laryngectomy due to a cancer in many cases. The main factor causing this type of cancer is smoking. Therefore, people who use [[Electrolarynx|electrolarynx]] or [[Speech prostheses|speech prostheses]] are involved in several anti-smoking campaigns, e.g., a cowboy singing with his electrolarynx a song with the refrain 'You don't always die from tobacco',<ref>mylexisdhose. Truth singing cowboy. Youtube [online]. 2008, Apr 10. Available online at: https://www.youtube.com/watch?v=eshSlxe9qd0 (Retrieved 17th January, 2017).</ref> or a man with an electrolarynx who sold cigarettes and told the story of his life.<ref>POLDEN, Jake. When smoking does not kill: Smokers receive powerful wake-up call when buying cigarettes from a man with an electrolarynx. Daily Mail [online]. 2015, Sep 2. Available online at: http://www.dailymail.co.uk/news/article-3219431/When-smoking-does-not-kill-Smokers-receive-powerful-wake-call-buying-cigarettes-man-electrolarynx.html#ixzz4W0g49sAC (Retrieved 17th January, 2017).</ref>
  
 
== Public Policy ==
 
== Public Policy ==
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<!-- Information related to any regulations (law, patents, ISOs, government recommendations and so on.) -->
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Devices that collect personal data have to comply with certain regulations.<ref>FERNBACK, Jan, PAPACHARISSI, Zizi. Online privacy as legal safeguard: the relationship among consumer, online portal, and privacy policies. New Media & Society, 2007, '''9'''(5), 715–734. DOI: 10.1177/1461444807080336 Available online at: http://journals.sagepub.com/doi/pdf/10.1177/1461444807080336 (Retrieved 2nd March, 2017).</ref> In addition, their use is banned in some companies, e.g., IBM.<ref>MCMILLAN, Robert. IBM Outlaws Siri, Worried She Has Loose Lips. Wired [online]. 2012, May 22. Available online at: https://www.wired.com/2012/05/ibm-bans-siri/ (Retrieved 16th December, 2016).</ref>
  
 
== Related Technologies, Projects or Scientific Research ==
 
== Related Technologies, Projects or Scientific Research ==
  
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http://www.speechtechmag.com/Articles/News/Speech-Technology-News-Features/IBM-Makes-Watson-TTS-More-Expressive--109477.aspx
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IBM works on the enrichment of speech synthesis by emotions.<ref> PEMBERTON, Tye. IBM Makes Watson TTS More Expressive. Speech Technology [online]. 2016, Feb 29. Available online at: http://www.speechtechmag.com/Articles/News/Speech-Technology-News-Features/IBM-Makes-Watson-TTS-More-Expressive--109477.aspx (Retrieved 2nd March, 2017).</ref>
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http://link.springer.com/journal/10772
 
  
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Several devices which are listed among the Internet of Things (IoT) could be controlled by an IPA.<ref name="IoT"/>
 
== References ==
 
== References ==
  

Latest revision as of 08:53, 9 May 2017

How Siri works.jpg

Speech technologies are technologies or devices that can understand and/or produce human-like speech. The speech generation is useful in applications such as text-to-speech, electrolarynges, speech prostheses, or intelligent personal assistants. The former three technologies are used as medical devices for people who have lost their voice. Speech synthesizers are also incorporated into devices that help visually disabled people. Intelligent personal assistants allow users to use their devices hands-free by merely saying required commands, mostly in plain, natural speech.

These speech technologies deal with the voice, which is the dominant tool of interpersonal communication.[1] The importance of the voice was acknowledged also by the fact that 16th April was chosen as World Voice Day.[2]

Main Characteristics

Speech technologies can be divided between technologies used in medicine and technologies for commercial use. While the former group is represented primarily by electrolarynges and speech prostheses, intelligent personal assistants belong to the latter category. Speech synthesis is used for both purposes. It is contained in intelligent personal assistants and GPS navigations, but also in systems for the visually impaired and speech synthesizers for people who have lost their voice.[3] These technologies appear in two forms: devices or software, or a combination of both.

Historical overview

The first speaking machines were developed in antiquity and the Middle Ages. Nonetheless, they were not genuine speaking machines, since they depended on people speaking inside of them. The first genuine speaking machine was introduced by Hungarian civil servant and inventor Wolfgan von Kempelen. He described his speech synthesiser in the book Mechanismus der menschlichen Sprache nebst der Beschreibung seiner sprechenden Maschin [The Mechanism of Human Speech, with a Description of a Speaking Machine], published in 1791.[4]

Theodore Billroth conducting a laryngectomy

In the 19th century, researchers focused also on helping people who lost their voice or have a serious problem with their throat. Jan Nepomuk Czermak described the first laryngeal prosthesis in 1859. His attempt was followed by the introduction of various speech prostheses and artificial larynges.[5] Later on, Austrian surgeon Theodore Billroth performed the first successful total extirpation of the larynx.[6]

The 20th century showed important breakthroughs in various fields of speech technologies. Speech synthesis started to be mechanized by the introduction of the first known electrical system, 'The Voder' in 1930.[7] New techniques of voice synthesis also made the synthetic voice to sound more natural and lately to allow the preservation of the voices of patients who are losing their voice.[8] The first electrolarynges were introduced in 1942 by G. M. Wright.[5] Surprisingly, the first tracheoesophageal voice prosthesis was not developed by a professional, but it was conducted by a patient using a red-hot ice pick in 1931. Surgeons, however, were unable to replicate this procedure.[9] Therefore, it was abandoned until Erwin Mozolewski presented his tracheoesophageal voice prosthesis.[10]

In the middle of the 20th century, the first speech recognition system was introduced. The first system was 'Audrey' which was able to recognise digits spoken by a single voice. It was followed by IBM's 'Shoebox' presented at the 1962 World's Fair. It was able to recognise 16 English words. Another important system for voice recognition was 'Harpy', which was developed by the U.S. Department of Defense between 1971 and 1976. It could recognise 1,011 words, similar to the capabilities of a 3 year-old child.[11] Apple presented the idea of an intelligent personal assistant in 1987. It was entitled Knowledge Navigator, but the advertised product was never developed.[12] The first publicly available personal assistant was Siri, introduced by Apple in 2010.[13] It was followed by the similar products of other companies as Alexa, Google Now, and Cortana.[14] Siri was software that was contained in iPhones. In 2014, Amazon.com presented its first intelligent personal assistant device Amazon Echo, which contains Alexa.[15] Its introduction also provoked the introduction of similar devices such as Google Home, Apple HomeKit, Lenovo Smart Assistant, etc.[14]


Important Dates

  • 1769: Wolfgang von Kempelen developed the first genuine speech synthesizer[16]
  • 1859: the first pneumatic laryngeal prosthesis was introduced by Jan Nepomuk Czermak[5]
  • 1873: Billroth conducted the first successful total laryngectomy[5]
  • 1931: the first laryngeal puncture was conducted by a patient[17]
  • 1937: the speech synthesizer 'The Voder' was unveiled[7]
  • 1942: Wright developed the first electrolarynx 'Sonovox'[18]
  • 1952: Bell Laboratories presented 'Audrey'[11]
  • 1972: Erwin Mozolewski introduced a tracheoesophageal voice prosthesis[19]
  • 1976: 'Harpy' was developed[11]
  • 1987: the Apple Knowledge Navigator was presented[20]
  • 4th February 2010: Siri Inc. unveiled Siri, which was later acquired by Apple[13]
  • 6th November 2014: Amazon.com introduced Amazon Echo[15]

Enhancement/Therapy/Treatment

Therapy & Treatment

Stephen Hawking, the most renowned user of speech synthesis

The purpose of speech prostheses and electrolarynges is to return the ability to speak to patients who have undergone total laryngectomy or lost their voice in some other way.[21] Certain speech synthesizers could also be used for this purpose, even though speech synthesis is used also in non-therapeutic applications.[3] Patients could also achieve oesophageal speech, but it is difficult to learn, and certain patients are not able to communicate this way.[22] Each technique of voice restoration has its pros and cons. The electrolarynx's speech sounds mechanical and depends on the mechanical device, but it is easy to achieve, and it is used when any other methods have failed.[21] Speech prostheses have to be installed during surgery, the prosthesis has to be removed periodically[23], and the pitch is considerably low for women,[24] but in comparison to electrolarynx, prostheses have certain pitch control and are more intelligible.[23] Speech synthesis could preserve a patient's voice, but it depends on the voice conservation, which could be challenging.[8]

Customers' reviews suggest that intelligent personal assistants could be helpful for the elderly and disabled. These devices could make them more independent due to control of the environment which they provide.[25] Customers also claim that the devices could call for help when elderly or disabled people have an accident,[26] though, this claim has not yet been supported by research.

Speech synthesis is used in various applications and devices for the blind or people with vision impairments. It enables them to read content from a screen.[8] Speaking devices used as toys or GPS systems also benefit from speech synthesis. They are also used in call centres, where they handle common tasks of customers.[3]

Enhancement

Intelligent personal assistants (IPA) are meant to help users deal with several tasks, organise information, and provide help with complex tasks. Siri, the first IPA, was originally developed to solve military tasks[27]. However, IPAs are also currently used in medical care,[28] business, transportation,[29] and shopping[30]. IPAs could also control the smart devices which are in the household of their users, even though certain brands support only certain IPAs.[31] IPAs or speech synthesizers could help their users with the acquisition of foreign language.[32][33][34]

Ethical & Health Issues

Efficiency

The issue with which every speech technology struggles, is efficiency and quality of performance. As was mentioned in a previous section, the quality of the voice produced by the electrolarynx is low, even though newly introduced electrolarynges contain pitch control.[18] Although the voice produced by voice prostheses and speech synthesizers sounds better, it is still not natural.[3][24][35] Finally, intelligent personal assistants struggle with the recognition of different accents,[36] are only as efficient as the applications with they are compatible, and run only on their home device at the moment.[37]

Microsoft's Cortana, intelligent personal assistant

Privacy issues

The main issue linked with IPAs is data collection. IPAs collect various data about their users as personal contacts, location, and preferences, etc., in order to provide adequate service. Moreover, their speech synthesis is not processed at the device but in the remote centre.[38] These data are valuable for the companies, that collect them and can be used for their commercial purposes.[39] The data could also be misused, if they are stolen by a third party.[40] The majority of IPAs listen to all of the communication which happens around them. Although it could be switched off, this feature is not always used, since it is inconvenient.[41] The issue applies to some extent also with regard to speech synthesizers, especially on apps, which provide speech synthesis.[42]

Naturalness

The problem of 'uncanny valley' could also be applied on within speech technologies. Jan Romportl claims that the effect of uncanny valley have caused the more natural-sounding voices produced by current speech synthesizers to not have been entirely accepted.[43] In addition, the Gatebox IPA caused a controversy and was deemed to be creepy by certain journalists due to the fact that it tends to be considerably personal.[44] Nicholas Brazzi also warns that the personal connection to IPAs could have a negative effect on decision making and could be potentially dangerous and life-threatening.[45]

Post-surgery state

The use of certain types of electrolarynges and speech synthesizers could be limited after surgery due to the post-surgery state of the patient. Patients could be weak[46] and the tissue in his or her neck could be harmed by surgery or radiation. While certain conditions could change in a few days after surgery, if the tissue is scarred or radiated, the patient could not use a neck-type electrolarynx.[47]

Infection

Intra-oral electrolarynges tend to be corrupted by infection, and therefore patients have to care for them carefully.[48] The appropriate hygiene is also necessary in the handling of speech prostheses.[49]

Public & Media Impact and Presentation

Electrolarynx Guy from My Name Is Earl

Speech technologies feature in several sci-fi films, series, books, and video games. One of the best known is HAL from Stanley Kubrick's 2001: A Space Odyssey. It is a computer that turned to endanger the staff of the spaceship where installed. When it is switched off he sang Daisy Bell. Arthur C. Clark, the author of the plot, was inspired by his experience with a real computer that was able to sing this song.[50]

Several speech technologies, which are already available, also appear on screen. An electrolarynx was used by characters in Mad Max[51], South Park,[52] and My Name Is Earl[53]. Siri, an Apple's IPA, appeared in The Big Bang Theory[54], where one of the main characters falls in love with her, and was parodied in The Simpsons[55].

The most renowned user of speech synthesis might be Stephen Hawking, British physicist and cosmologist. Hawking lost his voice due to a tracheotomy that he underwent in 1985. He uses a system that Intel developed for him.[56] Intel released this software, which is entitled ACAT, for free. It is meant to help patients with the same diagnosis as Hawking has, amyotrophic lateral sclerosis, as well as other disabled people.[57]

Loss of voice is caused by total laryngectomy due to a cancer in many cases. The main factor causing this type of cancer is smoking. Therefore, people who use electrolarynx or speech prostheses are involved in several anti-smoking campaigns, e.g., a cowboy singing with his electrolarynx a song with the refrain 'You don't always die from tobacco',[58] or a man with an electrolarynx who sold cigarettes and told the story of his life.[59]

Public Policy

Devices that collect personal data have to comply with certain regulations.[60] In addition, their use is banned in some companies, e.g., IBM.[61]

Related Technologies, Projects or Scientific Research

IBM works on the enrichment of speech synthesis by emotions.[62]

Several devices which are listed among the Internet of Things (IoT) could be controlled by an IPA.[31]

References

  1. ↑ LALWANI, Mona. Personal assistants are ushering in the age of AI at home. Engadget [online]. 2016, Oct 5. Available online at: https://www.engadget.com/2016/10/05/personal-assistants-google-home-ai/ (Retrieved 5th January, 2017).
  2. ↑ SIEGEL-ITZKOVICH, Judy. Voice of the people. The Jerusalem Post [online]. 2015, Apr 26. Available online at: http://www.jpost.com/Israel-News/Health/Voice-of-the-people-399185 (Retrieved 17th January, 2017).
  3. ↑ 3.0 3.1 3.2 3.3 TAYLOR, Paul. Text-to-Speech Synthes. University of Cambridge Department of Engineering [online]. 2014. Available online at: http://mi.eng.cam.ac.uk/~pat40/ttsbook_draft_2.pdf (Retrieved 2nd February, 2017).
  4. ↑ DUDLEY, Homer, TARNOCZY, T. H. The speaking machine of Wolfgang von Kempelen. Journal of the Acoustical Society of America 22, 151-166. Doi:10.1121/1.1906583. Available online at: http://pubman.mpdl.mpg.de/pubman/item/escidoc:2316415:3/component/escidoc:2316414/Dudley_1950_Speaking_machine.pdf (Retrieved 2nd February, 2017).
  5. ↑ 5.0 5.1 5.2 5.3 KEITH, Robert L., SHANKS, James, Laryngectomee Rehabilitation: Past and Present. In: Speech and Language: Advances in Basic research and Practice. New York: Academic Press, 1983. Available online at: https://books.google.cz/books?id=0C60BQAAQBAJ&pg=PA126&lpg=PA126&dq=Cooper-Rand+electrolarynx&source=bl&ots=or27eudDf2&sig=22heagC08Fpk57qGILvufHxwCyM&hl=cs&sa=X&ved=0ahUKEwi1--bt3r7RAhWGuxQKHbrFCC04ChDoAQgdMAE#v=onepage&q=Cooper-Rand%20electrolarynx&f=false (Retrieved 13th January, 2017).
  6. ↑ KAZI, R. A., et al. Christian Albert Theodor Billroth: Master of surgery. Journal of postgraduate medicine, 2004, 50.1: 82. Available online at: https://tspace.library.utoronto.ca/bitstream/1807/2074/1/jp04025.pdf (Retrieved 25th February, 2016).
  7. ↑ 7.0 7.1 DUNCAN. Klatt’s Last Tapes: A History of Speech Synthesisers. Communication Aids [online]. 2013, Aug 10. Available online at: http://communicationaids.info/history-speech-synthesisers (Retrieved 2nd February, 2017).
  8. ↑ 8.0 8.1 8.2 JŮZOVÁ, M., TIHELKA, D., MATOUŠEK, J. Designing High-Coverage Multi-level Text Corpus for Non-professional-voice Conservation. In: Speech and Computer. Volume 9811 of the series Lecture Notes in Computer Science. Cham: Springer, 2016, pp 207-215. Doi: 10.1007/978-3-319-43958-7_24 Available online at: http://link.springer.com/chapter/10.1007/978-3-319-43958-7_24 (Retrieved 16th February, 2017).
  9. ↑ BLOM, Eric D. Current Status of Voice Restoration Following Total Laryngectomy. Oncology [online]. 2000, Jun 1. Available online at: http://www.cancernetwork.com/head-neck-cancer/current-status-voice-restoration-following-total-laryngectomy (Retrieved 19th January, 2017).
  10. ↑ MOZOLEWSKI, Erwin S., et al. "Arytenoid vocal shunt in laryngectomized patients." The Laryngoscope 85.5 (1975): 853-861.
  11. ↑ 11.0 11.1 11.2 PINOLA, Melanie. Speech Recognition Through the Decades: How We Ended Up With Siri. PCWorld [online]. 2011, Nov 2. Available online at: http://www.pcworld.com/article/243060/speech_recognition_through_the_decades_how_we_ended_up_with_siri.html (Retrieved 28th February, 2017).
  12. ↑ DUBBERLY, Hugh. The Making of Knowledge Navigator. DDO [online]. 2007, Mar 30. Available online at: http://www.dubberly.com/articles/the-making-of-knowledge-navigator.html (Retrieved 5th January, 2017).
  13. ↑ 13.0 13.1 HARRISON, Natalie and BREWER, Teresa. Apple Launches iPhone 4S, iOS 5 & iCloud. Apple [online]. 2011. Oct 4. Available online at: http://www.apple.com/pr/library/2011/10/04Apple-Launches-iPhone-4S-iOS-5-iCloud.html (Retrieved 16th December, 2016).
  14. ↑ 14.0 14.1 POGUE, David. The Problem with Tech Copycats. Scientific American [online].315(5), p. 23-23. Available online at: http://ve5kj6kj8s.scholar.serialssolutions.com/?sid=google&auinit=D&aulast=Pogue&atitle=The+Problem+with+Tech+Copycats&id=doi:10.1038/scientificamerican1116-23&title=Scientific+American&volume=315&issue=5&date=2016&spage=23&issn=0036-8733 (Retrieved 19th December, 2016).
  15. ↑ 15.0 15.1 WELCH, Chris. Amazon just surprised everyone with a crazy speaker that talks to you. The Verge [online]. 2014, Nov 6. Available online at: http://www.theverge.com/2014/11/6/7167793/amazon-echo-speaker-announced (Retrieved 20th December, 2016).
  16. ↑ WOODFORD, Chris. Speech synthesizers. EXPLAINTHATSTUFF [online]. 2017, Jan 21. Available online at: http://www.explainthatstuff.com/how-speech-synthesis-works.html (Retrieved 16th February, 2017).
  17. ↑ BLOM, Eric D. Current Status of Voice Restoration Following Total Laryngectomy. Oncology [online]. 2000, Jun 1. Available online at: http://www.cancernetwork.com/head-neck-cancer/current-status-voice-restoration-following-total-laryngectomy (Retrieved 19th January, 2017).
  18. ↑ 18.0 18.1 LIU, Hanjun, NG, Manwa L. Electrolarynx in voice rehabilitation. Auris Nasus Larynx, 2007, 34.3: 327-332.
  19. ↑ TARNOWSKA, Czesława. Wspomnienie o profesorze Erwinie Mozolewskim. Pomorski Uniwersytet Medyczny w Szczecinie [online]. Available online at: https://www.pum.edu.pl/__data/assets/file/0009/14868/Wspomnienie_o_profesorze_Erwin_7517.pdf (Retrieved 19th January, 2017).
  20. ↑ DigiBarn Computer Museum. The Knowledge Navigator concept piece by Apple Computer (1987). DigiBarn Computer Museum [online]. Available online at: http://www.digibarn.com/collections/movies/knowledge-navigator.html (Retrieved 5th January, 2017).
  21. ↑ 21.0 21.1 BROWN, Dale H. et al. Postlaryngectomy Voice Rehabilitation: State of the Art at the Millennium, World Journal of Surgery [online]. 2003, 14 May. DOI: 10.1007/s00268-003-7107-4 Available online at: http://link.springer.com/article/10.1007/s00268-003-7107-4 (Retrieved 16th January, 2017).
  22. ↑ GARDNER, Warren H., HARRIS, Harold E. Aids and Devices for Laryngectomees. Arch Otolaryngol 73(2) [online]. 1961: 145-152. Doi: 10.1001/archotol.1961.00740020151003 Available online at: http://jamanetwork.com/journals/jamaotolaryngology/article-abstract/1766151 (Retrieved 17th January, 2017).
  23. ↑ 23.0 23.1 SERRA, A. et al. Post-laryngectomy voice rehabilitation with voice prosthesis: 15 years experience of the ENT Clinic of University of Catania. ACTA otorhinolaryngologica italica [online]. 2015; 35(6): 412-419. Doi: 10.14639/0392-100X-680 Available online at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4755057/ (Retrieved 23rd January, 2017).
  24. ↑ 24.0 24.1 TEN HALLERS, E. J. O. et al. Difficulties in the fixation of prostheses for voice rehabilitation after laryngectomy. Acta Oto-Laryngologica [online]. 2009, Jul 8. Doi: 10.1080/00016480510031506 Available online at: http://www.tandfonline.com/doi/abs/10.1080/00016480510031506 (Retrieved 23rd January, 2017).
  25. ↑ Patrickometry. Alexa is a Revolution for my Disabled Family Member. Amazon [online]. 2015, Sep 6. Available online at: https://www.amazon.com/Amazon-SK705DI-Echo/product-reviews/B00X4WHP5E (Retrieved 21st December, 2016).
  26. ↑ Alex S. Already very practical for overcoming disability issues. Amazon [online]. 2015, Jun 19. Available online at: https://www.amazon.com/review/RTRDKUJDZCO4B/ref=cm_cr_dp_title?ie=UTF8&ASIN=B00X4WHP5E&channel=detail-glance&nodeID=9818047011&store=amazon-home&tag (Retrieved 21st December, 2016).
  27. ↑ BOSKER, Blanca. SIRI RISING: The Inside Story Of Siri’s Origins — And Why She Could Overshadow The iPhone. The Huffington Post [online]. 2013, Jan 24. Available online at: http://www.huffingtonpost.com/2013/01/22/siri-do-engine-apple-iphone_n_2499165.html (Retrieved 15th December, 2016).
  28. ↑ KOMNINOS, Andreas. STAMOU, Sofia. HealthPal: An Intelligent Personal Medical Assistant for Supporting the Self-Monitoring of Healthcare in the Ageing Society. Research Gate [online]. Available online at: https://www.researchgate.net/publication/228643857_HealthPal_an_intelligent_personal_medical_assistant_for_supporting_the_self-monitoring_of_healthcare_in_the_ageing_society (Retrieved 6th January, 2017).
  29. ↑ MIT Technology Review Custom, PwC. AI Drives Better Business Decisions. MIT Technology Review [online]. 2016, Jun 20. Available online at: https://www.technologyreview.com/s/601732/ai-drives-better-business-decisions/ (Retrieved 6th January, 2017).
  30. ↑ WINARSKY, Norman and MARK, William. The Future Of The Virtual Personal Assistant. TechCrunch [online]. Mar 25, 2012 Available online at: https://techcrunch.com/2012/03/25/the-future-of-the-virtual-personal-assistant/ (Retrieved 16th December, 2016).
  31. ↑ 31.0 31.1 THIBODEAUX, Rose. The Ultimate Guide to Smart Home Compatibility. Home Alarm Report [online]. 2017, Jan 4. Available online at: http://homealarmreport.com/ultimate-guide-smart-home-compatibility/ (Retrieved 11th January, 2017).
  32. ↑ GOKSEL-CANBEK, N., MUTLU, M. E. On the track of Artificial Intelligence: Learning with Intelligent Personal Assistants. International Journal of Human Sciences, 13(1), 2016, p. 592-601. Doi: 10.14687/ijhs.v13i1.3549 Available online at: https://www.j-humansciences.com/ojs/index.php/IJHS/article/view/3549/1661 (Retrieved 6th January, 2017).
  33. ↑ MOLDEN, Martin. Employing Apple's Siri to practice pronunciation: A preliminary study on Arabic speakers. TESOL Working Paper Series 13, p. 2-17. Available online at: http://www.hpu.edu/CHSS/English/TESOL/ProfessionalDevelopment/2015_TWP13/02Molden2015Siri.pdf (Retrieved 19th December, 2016).
  34. ↑ CHINNERY, George M. EMERGING TECHNOLOGIES Going to the MALL: Mobile Assisted Language Learning. Language Learning & Technology [online], 10(1), (2016): 9-16. Available online at: http://archive.is/YU9D. (Retrieved 28th February, 2017).
  35. ↑ VAN DER TORN, M. A sound-producing voice prosthesis. Amsterdam, 2005. Dissertation thesis. Vrije Universiteit.
  36. ↑ DART, Tom. Y'all have a Texas accent? Siri (and the world) might be slowly killing it. The Guardian [online]. 2016, Feb 10. Available online at: https://www.theguardian.com/technology/2016/feb/10/texas-regional-accent-siri-apple-voice-recognition-technology (Retrieved 28th February, 2017).
  37. ↑ CORBYN, Zoë. Meet Viv: the AI that wants to read your mind and run your life. The Guardian [online]. 2016, Jan 31. Available online at: https://www.theguardian.com/technology/2016/jan/31/viv-artificial-intelligence-wants-to-run-your-life-siri-personal-assistants (Retrieved 10th January, 2017).
  38. ↑ KENNY, Gavin. I Know Everything About You! The Rise of the Intelligent Personal Assistant. Security Intelligence [online]. 2015, Aug 12. Available online at: https://securityintelligence.com/i-know-everything-about-you-the-rise-of-the-intelligent-personal-assistant/ (Retrieved 9th January, 2017).
  39. ↑ EGAN, Matt. No one cares about privacy. TechAdvisor [online]. 2014, Mar 24. Available online at: http://www.techadvisor.co.uk/opinion/internet/no-one-cares-about-privacy/ (Retrieved 28th February, 2017).
  40. ↑ COHEN, P., CHEYER, A., HOROVITZ, E., EL KALIOUBY, R. & WHITTAKER, S. A Future for Personal Assistants. ACM CHI 2016: Panel Session, San Jose, May 7-12, 2016. Available online at: http://www.adam.cheyer.com/papers/chi16.pdf (Retrieved 9th January, 2017).
  41. ↑ CARROLL, Rory. Goodbye privacy, hello 'Alexa': Amazon Echo, the home robot who hears it all. The Guardian [online]. 2015, Nov 21. Available online at: https://www.theguardian.com/technology/2015/nov/21/amazon-echo-alexa-home-robot-privacy-cloud (Retrieved 10th January, 2017).
  42. ↑ WebWhispers.org. Text to speech apps for Phones and Pads. WebWhispers.org [online]. 2017. Available online at: http://www.webwhispers.org/library/TexttoSpeechApps.asp (Retrieved 16th February, 2017).
  43. ↑ ROMPORTL, Jan. Speech Synthesis and Uncanny Valley. In: Text, Speech, and Dialogue. Cham: Springer, 2014, p. 595-602. Doi: 10.1007/978-3-319-10816-2_72 Available online at: http://link.springer.com/chapter/10.1007/978-3-319-10816-2_72 (Retrieved 2nd February, 2017).
  44. ↑ ONES, Rhett. Virtual Assistant Lets You Imprison Your Anime Girlfriend and Feel Loved. Gizmodo [online]. 2016, Dec 17. Available online at: http://gizmodo.com/virtual-assistant-lets-you-imprison-your-anime-girlfrie-1790234598 (Retrieved 22nd December, 2016).
  45. ↑ BRAZZI, Nicholas. Don't call it "she"​. It's a computer, not a person. LinkedIn [online]. 2017, Jan 12. Available online at: https://www.linkedin.com/pulse/dont-call-she-its-computer-person-nicholas-brazzi (Retrieved 13th January, 2017).
  46. ↑ Advance Health Network. Industry News: Cooper-Rand Electronic Speech Prosthesis. Advance Health Network [online]. Available online at: http://speech-language-pathology-audiology.advanceweb.com/Article/Cooper-Rand-Electronic-Speech-Prosthesis.aspx (Retrieved 13th January, 2017).
  47. ↑ SHUTE, Brian. There's Nothing Like the Sweet Spot: Placement of the Artificial Larynx. DrShute.com [online]. 1997, Oct. Available online at: http://www.drshute.com/archives/2004/08/theres_nothing.html (Retrieved 16th January, 2017).
  48. ↑ MOFFET, Bethann, PINDZOLA, Rebekah H. Acustic Properties of Artifical Larynx Speech. ASHA [online]. 1988. Available online at: http://www.asha.org/uploadedFiles/asha/publications/cicsd/1988AcousticProperties.pdf (Retrieved 16th January, 2017).
  49. ↑ BROOK, Itzhak. The Laryngectomee Guide. American Academy of Otolaryngology–Head and Neck Surgery [online]. 2015. Available online at: https://www.entnet.org/sites/default/files/LaryngectomeeGuide.pdf (Retrieved 19th January, 2017).
  50. ↑ MCLELLAN, Charles. How we learned to talk to computers, and how they learned to answer back. TechRepublic [online]. Available online at: http://www.techrepublic.com/article/how-we-learned-to-talk-to-computers/ (Retrieved 3rd March, 2017).
  51. ↑ The Mad Max Wiki. Charlie. The Mad Max Wiki [online]. Available online at: http://madmax.wikia.com/wiki/Charlie (Retrieved 17th January, 2017).
  52. ↑ South Park Wiki. Ned Gerblansky. South Park Wiki [online]. Available online at: http://southpark.wikia.com/wiki/Ned_Gerblansky (Retrieved 17th January, 2017).
  53. ↑ My Name Is Earl Wiki. Electrolarynx Guy. My Name Is Earl Wiki [online]. Available online at: http://mynameisearl.wikia.com/wiki/Electrolarynx_Guy (Retrieved 17th January, 2017).
  54. ↑ RAWSON, Chris. Siri guest stars on CBS's Big Bang Theory. Engadget [online]. 2012, Jan 30. Available online at: https://www.engadget.com/2012/01/30/siri-guest-stars-on-cbss-big-bang-theory/ (Retrieved 10th January, 2017).
  55. ↑ WEHNER, Mike. The Simpsons pokes fun at Siri. Engadget [online]. 2013, Nov 4. Available online at: https://www.engadget.com/2013/11/04/the-simpsons-pokes-fun-at-siri/ (Retrieved 10th January, 2017).
  56. ↑ MEDEIROS, Joao. How Intel Gave Stephen Hawking a Voice. Wired [online]. 2015, Jan 13. Available online at: https://www.wired.com/2015/01/intel-gave-stephen-hawking-voice/ (Retrieved 3rd March, 2017).
  57. ↑ MCHUGH, Molly. You Can Now Use Stephen Hawking’s Speech Software for Free. Wired [online]. 2015, Aug 18. Available online at: https://www.wired.com/2015/08/stephen-hawking-software-open-source/ (Retrieved 3rd March, 2017).
  58. ↑ mylexisdhose. Truth singing cowboy. Youtube [online]. 2008, Apr 10. Available online at: https://www.youtube.com/watch?v=eshSlxe9qd0 (Retrieved 17th January, 2017).
  59. ↑ POLDEN, Jake. When smoking does not kill: Smokers receive powerful wake-up call when buying cigarettes from a man with an electrolarynx. Daily Mail [online]. 2015, Sep 2. Available online at: http://www.dailymail.co.uk/news/article-3219431/When-smoking-does-not-kill-Smokers-receive-powerful-wake-call-buying-cigarettes-man-electrolarynx.html#ixzz4W0g49sAC (Retrieved 17th January, 2017).
  60. ↑ FERNBACK, Jan, PAPACHARISSI, Zizi. Online privacy as legal safeguard: the relationship among consumer, online portal, and privacy policies. New Media & Society, 2007, 9(5), 715–734. DOI: 10.1177/1461444807080336 Available online at: http://journals.sagepub.com/doi/pdf/10.1177/1461444807080336 (Retrieved 2nd March, 2017).
  61. ↑ MCMILLAN, Robert. IBM Outlaws Siri, Worried She Has Loose Lips. Wired [online]. 2012, May 22. Available online at: https://www.wired.com/2012/05/ibm-bans-siri/ (Retrieved 16th December, 2016).
  62. ↑ PEMBERTON, Tye. IBM Makes Watson TTS More Expressive. Speech Technology [online]. 2016, Feb 29. Available online at: http://www.speechtechmag.com/Articles/News/Speech-Technology-News-Features/IBM-Makes-Watson-TTS-More-Expressive--109477.aspx (Retrieved 2nd March, 2017).
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