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An Electrical Analogue of the Vocal Organs


IN connexion with correspondence which recently has appeared in the columns of NATURE relating to the physical characteristics of vowel-sounds, the following account may be of interest of an apparatus believed to be novel, which is conveniently capable of the artificial production of many speech-sounds. It is well known that Helmholtz succeeded in imitating vowels by combinations of tuning forks, and Miller by combinations of organ pipes. Others, notably Scripture, have constructed apparatus wherein the transient oscillations of air in resonant cavities were excited by series of puffs of air, in close physical imitation of the action of the human vocal organs. It seems hitherto to have been overlooked that a functional copy of the vocal organs can be devised which depends upon the production of audio-frequency oscillations in electrical circuits.

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STEWART, J. An Electrical Analogue of the Vocal Organs. Nature 110, 311–312 (1922).

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