Tunable Planar Acoustic Notch Filter Utilizing Pneumatic Deforming Helmholtz Resonator Array

Fumiya Mizukoshi, Hidetoshi Takahashi

研究成果: Conference contribution

抄録

This paper reports a tunable acoustic notch filter utilizing a Helmholtz resonator (HR) array. Passive acoustic filters based on mechanical resonators have the advantages of no power supply requirement; however, the filtering frequency is not adjustable compared to active noise control. The proposed device consists of three-layered parts: cavities, a membrane, and microchannels. The cavities work as HR chambers, which determine the resonant frequency. Due to the HR effect, the acoustic wave is effectively insulated at the frequency. The HR chamber volume can be changed by deforming the membrane with air pressure through the microchannels. Thus, it enables adjustment of the resonant frequency, realizing a tunable acoustic notch filter. The prototype device realized the frequency tuning approximately from 4 to 5 kHz with 10 dB filtering. Thus, it can handle a wide range of high-frequency noises that humans tend to find uncomfortable.

本文言語English
ホスト出版物のタイトル35th IEEE International Conference on Micro Electro Mechanical Systems Conference, MEMS 2022
出版社IEEE Computer Society
ページ849-851
ページ数3
ISBN(電子版)9781665409117
DOI
出版ステータスPublished - 2022
イベント35th IEEE International Conference on Micro Electro Mechanical Systems Conference, MEMS 2022 - Tokyo, Japan
継続期間: 2022 1月 92022 1月 13

出版物シリーズ

名前IEEE Symposium on Mass Storage Systems and Technologies
2022-January
ISSN(印刷版)2160-1968

Conference

Conference35th IEEE International Conference on Micro Electro Mechanical Systems Conference, MEMS 2022
国/地域Japan
CityTokyo
Period22/1/922/1/13

ASJC Scopus subject areas

  • ハードウェアとアーキテクチャ
  • 電子工学および電気工学

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