Electrical audio signal processing systems and devices – Having non-electrical feature – Having microphone
Patent
1991-05-28
1993-04-20
Dwyer, James L.
Electrical audio signal processing systems and devices
Having non-electrical feature
Having microphone
381168, 381169, H04R 102, H04R 2500
Patent
active
052049078
ABSTRACT:
An apparatus for mounting a noise cancelling microphone (34) within a communication device comprises a housing having a front portion (36), a back portion and side portions (40). The front portion (36) and one of the side portions (40) have apertures (38 and 40). Within the housing lies a receptacle (32 or 50 or 100) for retaining a microphone or transducer (34). The receptacle is arranged and constructed to form a chamber (32) between the apertures (38 and 40) in the front portion (36) and the side portion (40) of the housing.
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Motorola, Inc., DYNA T.A.C., Cellular Portable Telephone, Instruction Manual No. 69P81046E60-B, Oct. 15, 1985.
Karl David H.
Patel Bakulesh B.
Staple Bruce W.
Chiang Jack
Dwyer James L.
Meles Pablo
Motorola Inc.
Rhyne Lesley A.
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