Hybrid active silencer

Details Hybrid active silencer Hybrid active silencer

1985-12-18

1987-05-12

Rubinson, Gene Z.

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Adjacent ear

181222, E04B 199

Patent

active

046655492

ABSTRACT:
Acoustic attenuation apparatus (2) is provided for a duct (4) guiding an acoustic wave propagating (6) therethrough. A silencer (8) is provided for passively attenuating the acoustic wave in the duct, and a cancelling speaker (32) is provided within the silencer. The combination provides hybrid active/passive combined attenuation. Various rectangular and circular structures are disclosed, together with multi-path and multi-speaker arrangements.

REFERENCES:
patent: 2983790 (1961-05-01), Olson
patent: 3936606 (1976-02-01), Wanke
patent: 4025724 (1977-05-01), Davidson, Jr. et al.
patent: 4109108 (1978-08-01), Coxon
patent: 4122303 (1978-10-01), Chaplin
patent: 4473906 (1984-09-01), Warnaka et al.
patent: 4489441 (1984-12-01), Chaplin
patent: 4527282 (1985-07-01), Chaplin
"Active Noise Reduction Systems in Ducts", J. Tichy, G. E. Warnaka and L. A. Poole, ASME Journal, Nov. 1984, pp. 1-7.
"Historical Review and Recent Development of Active Attenuators", H. G., Leventhall, Acoustical Society of America, 104th Meeting, Orlando, Nov. 1982, FIG. 8.
"Active Adaptive Sound Control in a Duct: A Computer Simulation", J. C. Burgess, Journal of Acoustic Society of America, 70(3), Sep., 1981, pp. 715-726.
"The Implementation of Digital Filters Using a Modified Widrow-Hoff Algorithm for the Adaptive Cancellation of Acoustic Noise", L. A. Poole, G. E. Warnaka and Richard C. Cutter, 1984, IEEE, CH 1945-5/84/0000-0233, pp. 21.7.1-21.7.4.
"VLSI Systems Designed for Digital Signal Processing", Bowen and Brown, vol. 1, Prentice Hall, Englewood Cliffs, N.J., 1982, pp. 80-87.
"Comments on `An Adaptive Recursive LMS Filter`", Widrow et al., Proceedings of the IEEE, vol. 65, No. 9, Sep. 1977, pp. 1402-1404, FIG. 2.
Elliot and Nelson, I.S.V.R. Technical Report No. 127, Southampton University, England, published in U.S. Department of Commerce, National Technical Information Service, Bulletin No. PB85-189777, Apr. 1984, pp. 1-61.
Morgan "An Analysis of Multiple Correlation Cancellation Loops With a Filter in the Auxiliary Path", IEEE Transactions Acoustics Speech, Signal Processing, vol. ASSP-28, No. 4, pp. 454-467.
"Echo Cancellation Algorithms", Gritton and Lin, IEEE ASSP Magazine, Apr. 1984, pp. 30-38.
"Aspects of Network and System Theory", Widrow, Adaptive Filters, edited by R. E. Kalman and N. DeClaris, Holt, Reinhart and Winston, N.Y., 1971, pp. 563-587.
Gale Models HP, MP, LP, DS, DS-LP, SS and SS-LP.
Industrial Acoustics Company, Duct Silencers, Application Manual Bulletin 1.0301.2.
Universal Silencer, Division of Nelson Industries, Models U2 and SU5.
Sanders, "Silencers: Their Design and Application", Sound and Vibration, Feb. 1968, pp. 6-13.
"Acoustical Turning Vanes", HVAC Auxiliary Products, Gale Corporation, Noise Containment Division, P.O. Box 183, North Brunswick, N.J. 08902.

Affiliated with

Also associated with

Rating

Hybrid active silencer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hybrid active silencer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hybrid active silencer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1806456