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Study of acoustic metamaterial with negative density and negative bulk modulus

Research Project

Project/Area Number 24740267
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Mathematical physics/Fundamental condensed matter physics
Research InstitutionOkayama Prefectural University

Principal Investigator

SAKAGUCHI Koichiro  岡山県立大学, 情報工学部, 助教 (10551822)

Project Period (FY) 2012-04-01 – 2014-03-31
Project Status Completed (Fiscal Year 2013)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2012: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywords音響メタマテリアル
Research Abstract

In this study the characteristics of sound wave propagation in waveguide with an array of coupled-Helmholtz resonators and that of connected acoustic pipe were investigated with numerical simulation by finite element method. In the result, it was found that the coupled-Helmholtz resonator has two resonant modes in which two resonators oscillate in the same phase and the reverse phase each other, while the connected acoustic pipe has open-pipe resonant mode and closed-pipe resonant mode. In transmission spectra of sound wave in waveguide with an array of these units, several forbidden bands due to the eigenmode of each unit and periodicity of the system were obtained.

Report

(3 results)
  • 2013 Annual Research Report   Final Research Report ( PDF )
  • 2012 Research-status Report

URL: 

Published: 2013-05-31   Modified: 2019-07-29  

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