パラメトリックスピーカの反射を用いたアクティブノイズコントロール

• 田中 信雄

  首都大学東京システムデザイン学部

• 舘 亮佑

  首都大学東京大学院システムデザイン研究科

書誌事項

タイトル別名

• Active Noise Control Using Acoustic Wave Reflection of a Parametric Loudspeaker

抄録

This paper deals with active noise control (ANC) using an acoustic wave reflection of a parametric array loudspeaker (PAL). Making use of the strong directivity of a sound radiation a PAL has, it is possible to avoid spillover phenomenon leading to the augmentation of sound pressure in other region of the targeted control point. The strong directivity, however, may be double-edged for ANC. If an obstacle exists between a PAL and a target control point, it may no longer achieve ANC as a sound diffraction cannot be expected. To overcome this problem, this paper presents a control strategy based upon the use of a sound reflection, and hence the sound beam of a PAL may detour the obstacle, arriving at the control point. First, fundamental properties of a sound beam reflection are investigated, thereby assuring the possibility of a sound reflection for ANC. Furthermore, mathematical description of a sound beam is performed using a mirror image method, control effect of ANC being clarified. Finally, an experiment is conducted, demonstrating the validity of the proposed method.

収録刊行物

• 日本機械学会論文集Ｃ編

  日本機械学会論文集Ｃ編 77 (775), 764-773, 2011

  一般社団法人 日本機械学会

キーワード

• Active Noise Control
• Parametric Array Loud Speaker
• Ultra Sound Wave
• Acoustic Wave Reflection

詳細情報

• CRID: 1390001206386799872
• NII論文ID: 130000873787
• DOI: 10.1299/kikaic.77.764
• ISSN: 18848354
• ISSN: 03875024
• Web Site: http://www.jstage.jst.go.jp/article/kikaic/77/775/77_775_764/_pdf
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可