Transmission Analysis of Acoustic Metamaterials with Helmholtz Resonators

  • 呂 東穎

Student thesis: Master's Thesis


Noise reduction has long been an active research subject in the field of acoustic engineering A novel acoustic structure consisting of a perforated membrane-ring structure with a Helmholtz resonator was proposed in this thesis The transmission loss (TL) effective mass density velocity field and membrane displacement of the present structure are studied by using a finite element analysis software package COMSOL Multiphysics It is found that the addition of the Helmholtz resonator can produce a wider attenuation range compared to the use of the single membrane-type acoustic metamaterial By altering the dimensions of the Helmholtz resonator the desired attenuation frequency can be achieved
Date of Award2017 Aug 28
Original languageEnglish
SupervisorJung-San Chen (Supervisor)

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