Noise cancelling acoustical improvement to a communications devi

Details Noise cancelling acoustical improvement to a communications devi Noise cancelling acoustical improvement to a communications devi

1997-10-17

2000-08-22

Weaver, Scott L.

Telephonic communications

Terminal

Housing or housing component

381357, H04M 119

Patent

active

061084158

ABSTRACT:
A cellular telephone for reducing background noise comprising a housing having a receiver portion and a speaker portion; the receiver portion having a voice port and a noise port; a microphone isolator located within the receiver portion; at least one noise canceling microphone having a front end and a back end enclosed by the microphone isolator; an windscreen placed in front of the microphone and internally behind the voice port; and an acoustical port to permit a pressure gradient noise porting placed at the back end of the microphone and internally behind the noise port.

REFERENCES:
patent: 4584702 (1986-04-01), Walker, Jr.
patent: 5148471 (1992-09-01), Metroka et al.
patent: 5539834 (1996-07-01), Bartlett et al.
patent: 5627901 (1997-05-01), Josephson et al.
patent: 5682418 (1997-10-01), Ide
patent: 5890072 (1999-03-01), Rabe
patent: 5937361 (1999-08-01), Smith

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