Active acoustic attenuation system with overall modeling

Details Active acoustic attenuation system with overall modeling Active acoustic attenuation system with overall modeling

1990-05-03

1991-01-22

Ng, Jin F.

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Adjacent ear

G10K 1116, H04R 128

Patent

active

049875981

ABSTRACT:
An active acoustic attenuation system (200) has a first adaptive filter model M modeling the acoustic path P from an input transducer (10) to an output transducer (14), and a second adaptive filter model Q modeling the overall system from the input transducer (10) to an error transducer (16). A third adaptive filter model T models the transfer function S of the output transducer (14) and the error path E between the output transducer (14) and the error transducer (16), without an auxiliary random noise source.

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patent: 4677677 (1987-06-01), Eriksson
patent: 4736431 (1988-04-01), Allie et al.
patent: 4783817 (1988-11-01), Hamada et al.
patent: 4815139 (1989-03-01), Eriksson et al.
patent: 4837834 (1989-06-01), Allie
"Adaptive Active Noise Control: Structures, Algorithms and Convergence Analysis", Wei Ren and P. R. Kumar, Inter-Noise 89, Dec. 4-6, 1989, Newport Beach, CA, pp. 435-440.
"Adaptive Vibration Control Using An LMS-Based Control Algorithm", Scott D. Sommerfeldt and Jiri Tichy, Inter-Noise 89, Dec. 4-6, 1989, Newport Beach, CA, pp. 513-518.
"Adaptive Signal Processing", Widrow and Stearns, Prentice-Hall, Englewood Cliffs, NJ, 1985, pp. 100, 101.
"Active Sound Attenuation Using Adaptive Digital Signal Processing Techniques", Larry John Eriksson, Ph.D. Thesis, 1985, University of Wisconsin, Madison, p. 19.

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