ACTIVE NOISE CANCELLING MUFFLER

An active muffle noise cancellation system having an active controller (60), a speaker housing (41) with acoustic compliance 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...

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Bibliographische Detailangaben
Hauptverfasser:	MILLER, SCOTT, SHIPPS, J., CLAY
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR BLASTING ENGINE PLANTS IN GENERAL GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL MUSICAL INSTRUMENTS PHYSICS SOUND-PRODUCING DEVICES STEAM ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	An active muffle noise cancellation system having an active controller (60), a speaker housing (41) with acoustic compliance 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).