한국음향학회지 (The Journal of the Acoustical Society of Korea)
- 제9권6호
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- Pages.53-61
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- 1990
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- 1225-4428(pISSN)
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- 2287-3775(eISSN)
반사 소음을 고려한 능동 적응 소음 제어기의 실시간 구현
Real-time Implementationi of the Active Adaptive Noise Controller Considering the Reflected Noise
초록
Real-time implementations of the active adaptive noise controller are proposed and tested. There are three problems in active noise control such as real-time processing, an acoustic feedback of secondary signal and a time-delay of control system elements. For real-time processing, the DSP56001 was used. To avoid acoustic feedback, the secondary signal was excluded from prediction. And for compensation of time delay, the ahead prediction was applied. As the primary noise is reflected in space, the reflected noise should be controlled for perfect noise control. But in this case, the controller might be unstable. For solving the problem, it is proposed that the source noise and the reflected noise are predicted separately. Some experimental results show the stability and effectiveness of the proposed controller.
키워드