Telephonic communications – Terminal – Housing or housing component
Patent
1995-03-30
1995-09-05
Hofsass, Jeffery A.
Telephonic communications
Terminal
Housing or housing component
381 681, 381 686, H04M 100, H04R 2500
Patent
active
054486378
ABSTRACT:
A one-piece two-way voice communication earset is situated in or at the ear of the user and is operated hands-free. It includes either two separated microphones having their outputs combined or a single bidirectional microphone. In either case, the earset treats the user's voice as consisting of out-of-phase signals that are not canceled, but treats ambient noise, and any incidental feedback of sound from received voice signals, as consisting of signals more nearly in-phase that are canceled or greatly reduced in level. The microphones are preferably electret microphones. In addition, a logarithmic amplification circuit reduces residual ambient noise during non-speaking intervals. The earset includes a receiver coupled to a communication medium and a speaker coupled to the receiver for emitting sound from received voice signals primarily to the user's ear canal. A transmitter, a part of the earset also coupled to the communication medium and located outside the ear canal, houses the two microphones or the one bidirectional microphone.
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Konomi Masao
Yamaguchi Noboru
Chiang Jack
Hofsass Jeffery A.
Pan Communications, Inc.
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