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A multichannel active system for control of the booming inside a van

AuthorsBravo, Teresa ; Cobo, Pedro; Martín, Juan Manuel
Issue DateMar-1999
PublisherDeutsche Gesellschaft für Akustik
Citation137th Meeting of the Acoustical Society of America. Structural Acoustics and Vibration ; 11
AbstractAn active sound control (ANC) system has been developed to reduce the booming of a van arisen when the engine noise excites some modes of the passenger compartment. Specially the SO-250 HZ frequency range is of primary interest. The intention is to implement a feedforward system, using microphones as error sensors and loudspeakers as secondary sources. First, a reference signal, coherent with the unwanted noise, has to be searched. The acoustic field inside the van is expressed as the sum of a series of acoustics modes. The optimal locations of loudspeakers are found by simulated annealing. Finally, the multichannel active noise control system is implemented using a commercial system. Measurements of noise reduction has been carried out in the semianechoic room at NECT-E under usual driving conditions (3rd gear, fast acceleration).
Description4 pp.-- Comunicación presentada en: Joint Meeting "Berlin 99": 137th regular meeting of the Acoustical Society of America ; 2nd convention of the EAA: Forum Acusticum - integrating the 25th German Acoustics DAGA Conference. Berlin, March 14-19, 1999.
Appears in Collections:(IA) Comunicaciones congresos
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