Hybrid active silencer

Details Hybrid active silencer Hybrid active silencer

G - Physics

10

K

181/11

G10K 11/16 (2006.01) G10K 11/178 (2006.01)

Patent

CA 1255608

Abstract Acoustic attenuation apparatus (2) is pro- vided for a duct (4) guiding an acoustic wave propagat- ing (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 arrange- ments.

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