[10a-E207-1~6] 22.1 Joint Session M "Phonon Engineering"

10:00 AM - 10:15 AM JST(1:00 AM - 1:15 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[10a-E207-1] Analysis of absorption peak formation mechanism in multilayer membrane-type acoustic metasurfaces

〇Wataru Hamaguchi¹, Yusuke Hata¹, Yuri Fukaya¹, Kenji Tsuruta¹ (1.Okayama Univ.)

Keywords:

acoustic metasurface,membrane-type acoustic metamaterial,low-frequency sound absorption

This study investigates the peak multiplication of membrane-type acoustic metasurfaces by stacking them along the direction of sound propagation. Based on an equivalent model in which the membrane and air layer are regarded as a mass and a spring, respectively, the formation of multiple resonances in the multilayer structure is considered. Numerical simulations showed that the absorption peak frequencies tend to change with the air-layer thickness. In this presentation, the sound absorption characteristics of the multilayer structure and its potential as a design guideline for targeting specific noise frequencies will be introduced.