Multi-chamber noise control system

Details Multi-chamber noise control system Multi-chamber noise control system

2011-08-23

2011-08-23

Faulk, Devona (Department: 2614)

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Within cabin or compartment of vehicle

C381S071100, C381S071500, C381S071700, C381S086000, C181S295000, C181S296000, C181S206000, C181S224000

Reexamination Certificate

active

08005235

ABSTRACT:
A noise control system is operable within a box-like structure provided by the dual bulkhead plenum of the vehicle dashboard positioned within the transfer path along which the noise is being transmitted from the source of the generated noise to the receiver of the noise in the passenger compartment of an automobile. The plenum is divided into discrete chambers into each of which is provided a counter noise generating apparatus to create a counteracting noise offsetting the noise generated at the source. The acoustic resonance of the chambers amplifies the noise control energy. The geometry of the individual chambers can be varied to optimize the packaging and sound control or shaping strategy. The sound energy permitted to pass through the plenum to the driver's side of the passenger compartment can be tuned to be different than the noise received in the passenger's side.

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