US 6,420,975 B1 · Interior rearview mirror sound processing system

Abstract

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.

Claims43

Dependent claims

An interior rearview mirror digital sound processing system suitable for use in a vehicle equipped with an audio system comprising:

an interior rearview mirror assembly, said mirror assembly comprising a mirror housing including a reflective element;
said interior mirror assembly including a microphone module capable of producing an audio output in response to detection of vocal input with vehicle cabin noise superimposed thereon, said microphone module comprising first and second microphones, said first microphone having a first zone of principal sensitivity directed generally in the direction of a windshield of the vehicle when said interior mirror assembly is mounted to a vehicle, said second microphone having a second zone of principal sensitivity directed in a direction that is different from that of said first zone of principal sensitivity, said second zone of principal sensitivity being directed generally toward at least the driver of the vehicle;
said assembly further including a digital sound processor;
said digital sound processor receiving a signal indicative of said audio output of said microphone module;
and
said digital signal processor processing said signal indicative of said audio output and providing an output vocal signal with reduced vehicle cabin noise.

3 more elements

Dependencies are inferred from the claim text.

Interior rearview mirror sound processing system

Life of this patent

Interior rearview mirror sound processing system

Life of this patent

Abstract

Claims43