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Active countersound system with special arrangement of the secondary actuators for reducing the passage of sound at an open boundary area of two volumes

A technology of exciter and main exciter, which is applied in the direction of sound-producing instruments, musical instruments, instruments, etc.

Inactive Publication Date: 2008-03-19
AIRBUS OPERATIONS GMBH
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

[0011] The systems described above have the disadvantage that active acoustic wave reduction can only be achieved in closed control volumes or in simple geometrical control volumes in which the one-dimensional sound waves propagate inside the control volume

Method used

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  • Active countersound system with special arrangement of the secondary actuators for reducing the passage of sound at an open boundary area of two volumes

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Embodiment Construction

[0044] In the following, an active noise reduction system device 30 according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0045] The active muffling system device 30 includes the active muffling system 10 and the control volume 20 . The active muffler system 10 comprises a regulator unit 11 , two error sensors 12 , a reference sensor 13 and four secondary exciters 14 . The sub-exciter 14 is designed as a loudspeaker capable of generating countersound waves 15 . These countersound waves 15 are sinusoidal sound waves and are detected by two error sensors 12 , wherein the two error sensors 12 are correspondingly designed as microphones in the present embodiment. The error sensor 12 is coupled to the regulator unit 11 by a line. Via this line, the error signal F detected by the error sensor 12 is sent to the regulator unit 11 . A primary sound wave 16 generated by a primary exciter (not shown) is picked up by a refe...

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Abstract

A reference sensor (13) detects a primary sound wave (16) and outputs a reference signal (R). An automatic controller (11) generates an error signal (F) based on the reference signal and a secondary signal (S) produced by secondary actuators (14). Counter sound waves (15) from the secondary actuators are reduced based on the error signal to obtain an optimal sound wave. The secondary actuators are arranged so as to be penetrable by the primary sound wave at the edge of an open depressing surface (21).

Description

[0001] References to related applications [0002] This application claims priority to German Patent Application No. 102005016021.2, filed April 7, 2005, and U.S. Provisional Patent Application No. 60 / 669,061, filed April 7, 2005, the disclosures of which are incorporated by reference combined here. technical field [0003] The invention relates to an active countersound system for active attenuation of the sound waves of at least one primary sound wave emitted from a primary exciter emitting the primary sound wave, and having a specific arrangement of secondary exciters to The transmission of sound waves at or through the open boundary region of the two volumes is reduced. Furthermore, the invention relates to an active noise reduction system arrangement, a method for active sound reduction, and a use of an active anti-sound system for active reduction against at least partially open The control volume of the sound wave. Background technique [0004] In general, sound wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/178
CPCG10K11/1788G10K2210/12G10K11/17857G10K11/17881
Inventor 哈拉尔德·布赖特巴赫克里斯蒂安·格尔纳德尔夫·扎豪约亨·佐默
Owner AIRBUS OPERATIONS GMBH
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