H - Electricity – 04 – R
Patent
H - Electricity
04
R
325/19, 349/59
H04R 3/00 (2006.01) H04R 1/46 (2006.01)
Patent
CA 1200006
ABSTRACT The invention consists in a voice transmitting system comprising: a microphone having a high impedance, means to hold the microphone in or adjacent an outer ear of a person so as substantially to enclose air between the microphone and the tympanic membrane of the ear, and a circuit for transmitting a signal produced or modulated by the microphone in response to sound waves, if any, which are transmitted via the persons oto-laryngeal system to the tympanic membrane and propogated in the enclosed air.
425177
Spike Robert G.
Vander Heyden Paulus P.a.
Heyden Spike Co. Pty. Limited
Stewart & Kolash Ltd
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