建物換気口のアクティブ騒音制御のための2つのマイクロホンを用いた生活音による制御性能低下の改善

概要

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Preservation of silence in the house is important for comfortable living environment. Ventilation openings, which are indispensable to keep indoor air clean, might be a bottleneck in the noise insulation. This study aims at improving noise reduction of the ventilation openings in low-frequency using active noise control(ANC) technique. In our previous study, basic performance of the ANC system for ventilation openings was examined. However, when the living sound is mixed into the ANC system, it is doubtful whether the noise reduction performance of the ANC will be ensured. In this paper, therefore, one tactic distinguishing between outdoor noise and indoor living sound with the difference of sound pressure level acquired by omni-directional and uni-directional microphones of the system is investigated to improve the ANC performance degraded by the living sound.
2009-07-15