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Planar acoustic filter using Helmholtz resonators

Research Project

Project/Area Number 25630075
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Dynamics/Control
Research InstitutionThe University of Tokyo

Principal Investigator

TAKAHASHI Hidetoshi  東京大学, 情報理工学(系)研究科, 助教 (90625485)

Research Collaborator ISOZAKI Akihiro  東京大学, 大学院理学系研究科, 特任研究員 (10732555)
Project Period (FY) 2013-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywordsヘルムホルツ共鳴器 / ノッチフィルタ / 音響フィルタ / マイクロ・ナノデバイス
Outline of Final Research Achievements

The developed acoustic filter consists of a number of spherical Helmholtz resonators (HRs), which are placed at the in-plane vertices of a regular polygon. A simulation result reveals that this uniform arrangement of HRs improves the silencing effect because the uniform applied waves emitted from the HRs act as canceling waves to the cross-section of the short hole. The total pressure emitted from the HRs is equal regardless of the number of HRs connected to the hole. Therefore, the arrangement of HRs is essential for realizing a planar notch filter. Simulated transmittance spectra demonstrated that the depth of the dip in the transmittance increases with the number of uniformly arranged HRs. It is confirmed that the experimental results with the fabricated filters, which consist of between one and six HRs, agrees with the simulated transmittance spectra.

Report

(3 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • Research Products

    (3 results)

All 2015 2014 2013

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Acknowledgement Compliant: 1 results) Presentation (2 results)

  • [Journal Article] Parallel helmholtz resonators for a planar acoustic notch filter2014

    • Author(s)
      [2]Akihiro Isozaki, Hidetoshi Takahashi, Hiroto Tamura, Tomoyuki Takahata, Kiyoshi Matsumoto and Isao Shimoyama
    • Journal Title

      Applied physics letter

      Volume: 104 Issue: 24 Pages: 241907-241907

    • DOI

      10.1063/1.4904509

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] ヘルムホルツ共振器を用いた平面型音響ノッチフィルター素子2015

    • Author(s)
      磯崎 瑛宏,高橋 英俊,田村 洋人,高畑 智之,松本 潔,下山 勲
    • Organizer
      応用物理学会2015年春秋講演会
    • Place of Presentation
      東海大学湘南キャンパス, 神奈川
    • Year and Date
      2015-03-11 – 2015-03-14
    • Related Report
      2014 Annual Research Report
  • [Presentation] ヘルムホルツ共鳴器を並列に接続した音響メタマテリアルに関する研究2013

    • Author(s)
      田村洋人, 高橋英俊, 高畑智之, 松本潔, 下山勲
    • Organizer
      センサ・マイクロマシン部門(E部門)平成25年度総合研究会
    • Place of Presentation
      東京工科大学, 蒲田キャンパス
    • Related Report
      2013 Research-status Report

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Published: 2014-07-25   Modified: 2019-07-29  

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