TY - GEN
T1 - Tunable Planar Acoustic Notch Filter Utilizing Pneumatic Deforming Helmholtz Resonator Array
AU - Mizukoshi, Fumiya
AU - Takahashi, Hidetoshi
N1 - Funding Information:
This research was supported by KGRI/IoT Healthcare Research Consortium.
Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - 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.
AB - 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.
KW - Acoustics
KW - Helmholtz resonator
KW - Pneumatic actuator
KW - Soundproof
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U2 - 10.1109/MEMS51670.2022.9699828
DO - 10.1109/MEMS51670.2022.9699828
M3 - Conference contribution
AN - SCOPUS:85126392903
T3 - Proceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS)
SP - 849
EP - 851
BT - 35th IEEE International Conference on Micro Electro Mechanical Systems Conference, MEMS 2022
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 35th IEEE International Conference on Micro Electro Mechanical Systems Conference, MEMS 2022
Y2 - 9 January 2022 through 13 January 2022
ER -