TY - JOUR
T1 - Design of non-circular membranes metasurfaces for broadband sound absorption
AU - Watanabe, Keita
AU - Fujita, Mikiya
AU - Tsuruta, Kenji
N1 - Funding Information:
This work was supported in part by the JSPS KAKENHI Grant No. 17K19035.
Publisher Copyright:
© 2020 The Japan Society of Applied Physics.
PY - 2020/7/1
Y1 - 2020/7/1
N2 - Acoustic metasurfaces have been attracting much attention due to their effectiveness in controlling sound wave propagation despite a structure well below the wavelength at operating frequency. We propose a novel decorated membrane resonator structure with multiple circular membranes leading to multiplexing the resonant modes through breaking symmetry of the membrane's vibrational modes. By numerical analysis, the structure is optimized for wideband (500 to 1500 Hz) sound absorption. The designed structure is fabricated by using a 3D printer and its sound absorption property is verified experimentally by an impedance tube measurement. The results demonstrate that the present approach is simple but effective to broadband sound absorption with thin and lightweight artificial acoustic structures.
AB - Acoustic metasurfaces have been attracting much attention due to their effectiveness in controlling sound wave propagation despite a structure well below the wavelength at operating frequency. We propose a novel decorated membrane resonator structure with multiple circular membranes leading to multiplexing the resonant modes through breaking symmetry of the membrane's vibrational modes. By numerical analysis, the structure is optimized for wideband (500 to 1500 Hz) sound absorption. The designed structure is fabricated by using a 3D printer and its sound absorption property is verified experimentally by an impedance tube measurement. The results demonstrate that the present approach is simple but effective to broadband sound absorption with thin and lightweight artificial acoustic structures.
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U2 - 10.35848/1347-4065/ab7e3e
DO - 10.35848/1347-4065/ab7e3e
M3 - Article
AN - SCOPUS:85084187640
SN - 0021-4922
VL - 59
JO - Japanese Journal of Applied Physics
JF - Japanese Journal of Applied Physics
M1 - SKKA06
ER -