Active noise cancelling muffler

Details Active noise cancelling muffler Active noise cancelling muffler

G - Physics

10

K

G10K 11/178 (2006.01) F01N 1/06 (2006.01) H03B 29/00 (2006.01) F01N 1/02 (2006.01)

Patent

CA 2188534

An active muffle noise cancellation system having an active controller (60), a speaker housing (41) with acoustic compli- ance spaces, a duct extension means (42, 43) in communication with said speaker housing and adapted to conform a dipole radiation pattern into a plane wave which can be measured by a microphone means (46).

Cette invention se rapporte à un système d'insonorisation à atténuateur acoustique actif, qui comprend une unité de commande active (60), une enceinte de haut-parleur (41) contenant des espaces de capacité acoustique, des moyens de prolongement de conduit (42, 43) placés en communication avec ladite enceinte de haut-parleur et servant à conférer à un diagramme de rayonnement dipôle la forme d'une onde plane qui peut être mesurée par un microphone (46).

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