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 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 actuator...

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Bibliographic Details
Main Authors SOMMER, JOCHEN, BREITBACH, HARALD, SACHAU, DELF, GERNER, CHRISTIAN
Format Patent
LanguageEnglish
French
German
Published 19.12.2007
Subjects
ACOUSTICS
ACOUSTICS NOT OTHERWISE PROVIDED FOR
METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL
MUSICAL INSTRUMENTS
PHYSICS
SOUND-PRODUCING DEVICES
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Summary: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).
Bibliography:Application Number: EP20060724041