Method and apparatus for controlling the sound field in a vehicl

Details Method and apparatus for controlling the sound field in a vehicl Method and apparatus for controlling the sound field in a vehicl

1983-06-29

1985-03-19

Rubinson, Gene Z.

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Adjacent ear

381 86, H04R 300

Patent

active

045063800

ABSTRACT:
The major resonance noise inducing engine vibration component is determined by sensing the ignition pulses produced by the engine ignition system and compared with pre-stored data to ascertain if cabin resonance is apt to occur. In the event that resonance is predicted counter vibration is produced by a speaker or speakers. In addition to the basic engine speed parameter, the load on the engine (e.g. throttle valve position, induction vacuum or the like) and the gear ratio in which the transmission is operating may also be sensed to determine the need for the counter vibration.

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