Matthew A Moyski

US Patent:

51858037, Feb 9, 1993

Filed:

Dec 23, 1991

Appl. No.:

7/812298

Inventors:

Matthew T. Moyski - Fenton MI
Raymond C. Spitz - Canton MI

Assignee:

Ford Motor Company - Dearborn MI

International Classification:

H04B 100

US Classification:

381 86

Abstract:

The invention enhances the ability of rear seat passengers in a vehicle to hear the speech of a front seat occupant. Two spaced microphones in the front seat area pick up speech signals which are differentially amplified and filtered in a bandpass filter and at least one notch filter. The filter signals are reproduced through speakers in the area of the rear seat. Differential amplification of the microphone signals results in greatly reduced acoustic feedback from the speakers to the microphones. The communication system of the invention is highly integrated into other communication and audio systems in the vehicle.