An Experimental Transistorized Artificial Larynx

Abstract

A new experimental artificial larynx, which makes use of transistors and miniaturized components to provide a voice for those who have lost the use of their vocal cords by surgical removal or paralysis, is described. The larynx operates by introducing a substitute for the sound of the vocal cords into the pharyngeal cavity by means of a vibrating driver held against the throat. The acoustic principles of normal and artificial speech production that were followed in arriving at the new design are presented, along with descriptions of the transistor circuit and its operating characteristics.