Proceedings of the Korean Society for Noise and Vibration Engineering Conference (한국소음진동공학회:학술대회논문집)
- 2011.10a
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- Pages.115-119
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- 2011
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- 1598-2548(pISSN)
Evaluation of low cost electret microphone performances for active noise control barriers
Abstract
Instead of very expensive sound record and professional measurement microphones the low cost Surface Mounted Device (SMD) microphones are proposed for practical barrier ANC system. FRF of the microphones and theirs sensitivity to the wind interferences are evaluated in semi anechoic chamber. The improvement of feedforward algorithm noise reduction index was evaluated based on measured coherence function between tested SMD and reference microphone. Test was performed at various wind speed from 1 m/s to 5 m/s.
Keywords
- Active Noise Control;
- SMD microphone;
- active noise control barrier;
- wind test;
- coherence function;
- FxLMS algorithm;
- FRF