Active noise control system with horn sound feature

Details Active noise control system with horn sound feature Active noise control system with horn sound feature

2005-06-28

2005-06-28

Zanelli, Michael J. (Department: 3661)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Vehicle subsystem or accessory control

C307S010100

Reexamination Certificate

active

06912454

ABSTRACT:
An active noise control system for use onboard a vehicle normally provides noise cancellation of engine sounds. The speaker of the active noise control system also emits a horn sound responsive to appropriate commands from a controller that receives a horn switch signal from a horn switch supported on a steering wheel assembly. The active noise control system controller enters a power saving mode when the vehicle ignition is turned off and the vehicle is not running. A horn switch activation during the power saving mode wakes up the controller so that the controller unmutes an amplifier and drives the speaker to emit the desired horn sound.

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