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Noise Attenuation Effect According to the Direction of Secondary Sound Source in Duct ANC System
Duct ANC System에서 부가음원 방향별 소음감소효과

2009 Transactions of the Korean Society for Noise and Vibration Engineering  

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In this paper, we studied on an attenuation effect of automobile exhaust noise according to the direction of canceling speaker in ANC system. Automobile exhaust noise was recorded at 800 rpm, 3500 rpm and 5000 rpm of a diesel engine. Directions of canceling speaker can be set to 30°, 90° and 150° against the primary noise flow by acrylic ducts to be made for the experimentation. DSP board with TMS320C6416 chip of Texas Instrument Co. used to control the ANC system. The algorithm of this ANC
more » ... em applied the Filtered-x-LMS algorithm that is modified to compensate for a property of DSP input signal and the secondary-path effect. As an experiment result, the direction of canceling speaker was proved to influence
doi:10.5050/ksnvn.2009.19.3.251 fatcat:2e6qsxlonrbknec3z3w2a2ku7a
Citation

"Noise Attenuation Effect According to the Direction of Secondary Sound Source in Duct ANC System." Transactions of the Korean Society for Noise and Vibration Engineering 19.3 (2009) 251-260