Active reduction of the two-way diffraction from a noise barrier by using feedforward control

Xun Wang, Takayuki Satake, Yosuke Koba, Satoshi Ishikawa, Shinya Kijimoto

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抄録

This paper develops a feedforward (FF) structure based active noise control (ANC) system that reduces the two-way diffraction from an office partition with the aim of actively creating isolated acoustic domains in open-plan offices. The FF-ANC system can only reduce the noise downstream of the reference sensor due to the causality requirement. Therefore, a coupled FF control structure is proposed to realize the reduction of two-way diffraction. This system applies a two-source loudspeaker array as the control source, and two microphones as the reference and error sensors. The directivity of the loudspeaker array is controlled to emit the control sound only into the corresponding control area. In comparison with the preceding active diffraction reducing systems, using a directivity controlled loudspeaker array can generate an absorptive acoustic boundary rather than a reflective boundary on the diffracting edge, which can isolate the acoustic environment without adding reverberation in a room. The effectiveness of the proposed system is verified by computer simulations.

本文言語英語
ホスト出版物のタイトルProceedings of the INTER-NOISE 2016 - 45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future
出版社German Acoustical Society (DEGA)
ページ576-586
ページ数11
出版ステータス出版済み - 8 21 2016
イベント45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future, INTER-NOISE 2016 - Hamburg, ドイツ
継続期間: 8 21 20168 24 2016

その他

その他45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future, INTER-NOISE 2016
国/地域ドイツ
CityHamburg
Period8/21/168/24/16

All Science Journal Classification (ASJC) codes

  • 音響学および超音波学

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