06420975 is referenced by 548 patents and cites 7 patents.

A digital sound processor is provided to enhance the vocal to non-vocal noise ratio of the signal processed by a vehicle audio system such as a cellular telephone, emergency communication device, or other audio device. Optionally, an indicator is provided for use with the vehicular audio system in order to provide a user of the audio system with a status signal relating to a reception quality of a vocal signal from the user. The microphone of the audio system may be mounted within an accessory module, which may be mounted to an interior surface of a vehicle windshield. The accessory module provides a fixed orientation of the microphone and is easily installed to the vehicle as it is manufactured or as an aftermarket device. The indicator may be mounted at the accessory module or elsewhere at the mirror assembly.

Title
Interior rearview mirror sound processing system
Application Number
9/466010
Publication Number
6420975 (B1)
Application Date
December 17, 1999
Publication Date
July 16, 2002
Inventor
Phillip A March
Holland
MI, US
Ralph A Spooner
Holland
MI, US
Niall R Lynam
Holland
MI, US
Jonathan E DeLine
Holland
MI, US
Agent
Van Dyke Gardner Linn & Burkhart
US
Assignee
Donnelly Corporation
MI, US
IPC
B60Q 1/00
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