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ARTIFICIAL_LARYNX

2014-11-26 20:32  
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ARTIFICIAL_LARYNX
Output is negative pulse whose repetition frequency is varied from 100 to 200 cps by rheostat to change pitch of voice while speaking. Modified telephone receiver serves as vibrator that is pressed against throat to transform generated vibrations into speech sounds by normalmal use of throat cavity, tongue, mouth, teeth, and lips. With practice, users can achieve sentence intelligibility above 97%.-Circuit Substitutes as Larynx, Electronics, 32:27, p 60-63.