Intake sound control apparatus

Details Intake sound control apparatus Intake sound control apparatus

1993-12-13

1995-08-29

Isen, Forester W.

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Adjacent ear

181206, 181228, G10K 1116

Patent

active

054467900

ABSTRACT:
A device for cancelling annoying sounds caused by operation of an internal combustion engine. An intake sound of the engine, and also a rotational speed of the engine, are obtained. The phase difference between the present intake sound and a desired intake sound is obtained using map data. The map data depends on the rotational speed of the engine and is specifically calculated so that at least the (n+0.5) harmonics (n integer.gtoreq.0) are cancelled. The phase data is used to drive a ceramic speaker or two oppositely directed ceramic speakers, to appropriately compensate the input sound.

REFERENCES:
patent: 3254484 (1966-06-01), Kopper
patent: 4506380 (1985-03-01), Matsui
patent: 4546733 (1985-12-01), Fukami et al.
patent: 4800985 (1989-01-01), Hanzawa et al.
patent: 4805733 (1989-02-01), Kato et al.
patent: 4878188 (1989-10-01), Ziegler, Jr.
patent: 4947434 (1990-08-01), Ito
patent: 5097923 (1992-03-01), Ziegler et al.
patent: 5119427 (1992-06-01), Hersh
patent: 5170433 (1992-12-01), Elliott et al.

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