Active noise cancellation system with integrated horn function

Details Active noise cancellation system with integrated horn function Active noise cancellation system with integrated horn function

2005-06-28

2005-06-28

Isen, Forester W. (Department: 2644)

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

C381S071400

Reexamination Certificate

active

06912286

ABSTRACT:
An active noise cancellation system has a speaker which is utilized to generate sound to cancel engine noise, as is known. An operator horn switch communicates with a control for the active noise cancellation system. Upon receiving a request from the operator for a horn signal, the control for the active noise cancellation system generates a horn tone from the speaker associated with the active noise cancellation system. If cancellation is in progress, the cancellation is preferably paused during the period of time when the horn signal is being emitted.

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International Search Report—Jan. 22, 2001.

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