Active countersound system with special arrangement of the...

Details Active countersound system with special arrangement of the... Active countersound system with special arrangement of the...

G - Physics

10

K

G10K 11/178 (2006.01)

Patent

CA 2597636

An active countersound system (10) for actively reducing the sound waves of primary sound waves (16), with a regulator unit (11), an error sensor (12), a reference sensor (13) and several secondary actuators (14). The secondary actuators (14) are designed to emit countersound waves (15), wherein the regulator unit (11), which is coupled to the secondary actuators (15), processes an error signal (F) and a reference signal (R), and generates a secondary signal (S), which by way of the coupling is conveyed to the secondary actuators (14) in order to control the secondary actuators (14) by means of the secondary signal (S) such that said secondary actuators (14) generate countersound waves (15) that reduce the error signal (F) so that optimal sound wave abatement is implemented, wherein the secondary actuators (14) are arranged such that they are located on the margin of an open passage area (21), which passage area (21) comprises a margin and is to be penetrated by the primary sound waves (16), in order to ensure active sound wave abatement of the open space that in the direction of passage is arranged behind the open passage area (21), of the countersound waves (15) in the manner of a curtain.

Système actif de réduction sonore (10) pour la réduction active des ondes sonores d'ondes sonores primaires (16), comportant : unité de régulation (11), capteur d'erreur (12), capteur de référence (13) et plusieurs actionneurs secondaires (14), lesquels sont conçus pour émettre des ondes de réduction sonore (15) ; l'unité de régulation (11), couplée aux actionneurs (15), traite un signal d'erreur (F) et un signal de référence (R), et produit un signal secondaire (S), qui par couplage est transmis aux actionneurs (14) pour le contrôle de ces actionneurs (14) via le signal secondaire (S), moyennant quoi les actionneurs (14) produisent des ondes de réduction sonore (15) qui réduisent le signal d'erreur (F) pour donner une réduction sonore optimale ; en l'occurrence, les actionneurs (14) sont disposés de façon à se trouver sur la marge d'une zone de passage ouverte (21), laquelle comporte une marge et doit être pénétrée par les ondes sonores primaires (16), de façon à assurer une réduction sonore active de l'espace ouvert qui, dans la direction du passage, se situe derrière la zone de passage ouverte (21) des ondes de réduction sonore (15) à la manière d'un rideau.

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