Electrical audio signal processing systems and devices – Acoustical noise or sound cancellation – Adjacent ear
Patent
1993-08-23
1995-05-30
Isen, Forester W.
Electrical audio signal processing systems and devices
Acoustical noise or sound cancellation
Adjacent ear
G10K 1116
Patent
active
054209323
ABSTRACT:
An active acoustic attenuation system and method which operates in a waveguide (i.e. duct or beam) to attenuate acoustic waves having energy in the plane wave node and in higher order nodes. The invention does this by sensing the acoustic wave at linearly independent locations across a waveguide, decoupling the signals to generate an independent signal for each node being attenuated, processing the signal for each node independently of one another, and combining the processed signals for each node to drive a set of actuators at linearly independent locations across a waveguide. The invention is useful for both sound control and vibration control.
REFERENCES:
patent: 4677676 (1987-06-01), Eriksson
patent: 4815139 (1989-03-01), Erickson
patent: 4837834 (1989-06-01), Allie
patent: 4987598 (1991-01-01), Eriksson
patent: 5022082 (1991-06-01), Eriksson et al.
patent: 5216721 (1993-06-01), Melton
patent: 5216722 (1993-06-01), Popovich
patent: 5237618 (1993-08-01), Bethel
patent: 5283834 (1994-02-01), Goodman et al.
"Higher Order Mode Effects in Circular Ducts and Expansion Chambers", J. Acoust. Soc. Am. 68(2) Aug., 1980, L. J. Eriksson.
"Development of the Filtered-U Algorithm for Active Noise Control", J. Acoust. Soc. Am. 89(1), Jan., 1991, L. J. Eriksson.
"Higher Order Mode Cancellation in Ducts Using Active Noise Control", Paper presented at Newport Beach, Calif. conference inter-noise, Dec. 4-6, 1989.
Digisonix, Inc.
Isen Forester W.
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