Active noise control system

Details Active noise control system Active noise control system

1985-09-23

1987-08-25

Rubinson, Gene Z.

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Adjacent ear

381 94, H04R 2700, H04B 1500

Patent

active

046898212

ABSTRACT:
An active noise control system reduces cabin noise levels for a propeller or propfan aircraft due to the propeller noise signature by making the output from a secondary noise source identical in amplitude but opposite in phase to the propeller noise signature.

REFERENCES:
patent: 4153815 (1979-05-01), Chaplin
patent: 4417098 (1983-11-01), Chaplin
patent: 4473906 (1984-09-01), Warnaka
patent: 4480333 (1984-10-01), Ross
patent: 4506380 (1985-03-01), Matsui
patent: 4562589 (1985-12-01), Warnaka
patent: 4589133 (1986-05-01), Swinbanks
patent: 4589137 (1986-05-01), Miller
patent: 4596033 (1986-06-01), Swinbanks
patent: 4607528 (1986-08-01), Kallergis

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