Microphone in a speech communicator

Details Microphone in a speech communicator Microphone in a speech communicator

1997-04-29

1999-06-15

To, Doris H.

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

455 90, 455351, 379433, 379434, 381338, 381375, 381382, H04B 138

Patent

active

059131780

ABSTRACT:
The present invention relates to a sound guide (5) in a speech communicator, for example a land mobile radio, a walkie talkie, a cordless telephone or a mobile telephone (1). To achieve good sound quality in such a telephone, a cover (3) is often used which reflects the speech in towards the microphone (6) in the body (2) of the telephone. By arranging an air tunnel as a sound guide (5) on the flip-cover and letting it conduct to the body of the telephone and the microphone, the sound quality is improved substantially. In order to avoid uneven frequency response which inevitably occurs in such sound guides due to resonance formation, attenuation material of conventional type is used inside the sound guide together with acoustic extinction by utilizing pressure minimums as a localization point for the microphone.

REFERENCES:
patent: 5197091 (1993-03-01), Takagi et al.
patent: 5446789 (1995-08-01), Loy et al.
patent: 5555449 (1996-09-01), Kim
patent: 5761298 (1998-06-01), Davis et al.
PCT International-type Search Report, Search Request No. 96/00512, dated Mar. 26, 1997.

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