Active noise control system for closed spaces such as...

G - Physics – 10 – K

Patent

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G10K 11/178 (2006.01) B64C 1/40 (2006.01)

Patent

CA 2231276

An active noise control system (20) which generates via an electronic controller (22) a canceling signal(s) which are responsive to a signal from an error sensor(s) (28) to drive a speaker (30) or array of speakers. Each speaker (30) is contained within an enclosure (33) and is inversely and rigidly mounted therein. The enclosure (33) attaches to the trim panels (25) attached to the closed structure (34) and the canceling sound wave form is directly primarily toward the interior surface (36) of the trim (25). Preferably, the speaker(s) (30) are flexibly suspended with mounts (38) to the trim (25). The enclosure (33) preferably includes planar wave guide means such as escapeways (40) for initially directing the canceling sound wave form (anti- noise) in a plane substantially parallel to the surface of the trim (25).

L'invention concerne un dispositif de limitation active du bruit (20) générant par le biais d'une unité électronique de commande (22) un ou plusieurs signaux d'annulation, signaux réagissant à un signal en provenance d'un ou de plusieurs détecteurs d'erreurs (28) afin de faire fonctionner un haut-parleur (30) ou une rangée de haut-parleurs, chacun d'eux se trouvant enfermé dans une enceinte (33), monté à l'envers et de façon rigide. L'enceinte (33) est fixée aux panneaux de la garniture (25) rattachés à la structure fermée (34) et l'onde sonore d'annulation est dirigée essentiellement vers la surface intérieure (36) de la garniture (25). Les haut-parleurs (30) sont, de préférence, suspendus de manière souple au moyen de supports (38) à la garniture (25). L'enceinte (33) comporte, de préférence, un équipement guide d'onde, de forme plane, des voies d'échappement (40) par exemple, afin d'orienter, dans un premier temps, l'onde sonore d'annulation (antibruit) vers un plan sensiblement parallèle à la surface de la garniture (25)

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