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Natural Science Forum / Physics / Acoustics / April 2005resonance frequency of perforated panel
Hi all, my name is nanggroe, I am a research student in Acoustics Lab. Univ. Technology Malaysia.I am a new comer here.. nice to join with you all. I am studying about perforated panel sound absortion coefficien using Boundary element method, but I can find the equation to calculate resonance frequency of perforated panel (stand alone panel without airgap, not helmholtz resonator). I will thank you very much for helping me solving this.. > Hi all, my name is nanggroe, I am a research student in Acoustics Lab. > Univ. Technology Malaysia.I am a new comer here.. nice to join with [quoted text clipped - 4 lines] > airgap, not helmholtz resonator). I will thank you very much for > helping me solving this. Try here: http://www.google.com/search?hl=en&lr=&q=perforated+panel+sound+formula&btnG=Search >>I am studying about perforated panel sound absortion coefficien using >>Boundary element method, but I can find the equation to calculate >>resonance frequency of perforated panel (stand alone panel without >>airgap, not helmholtz resonator). > Try here: > http://www.google.com/search?hl=en&lr=&q=perforated+panel+sound+formula&btnG=Search This paper has important information abour layered panels at and near their resonances (viz aircraft fuselages). Significant scattering of sound (re-radiation in directions different from the specular reflection) is predicted to occur. This calls for, in my opinion, confirming experiments, as it predicts a new family of acoustical diffusors. Angelo Campanella Perhaps you might start by stating the physical phenomenon that makes you believe such as panel would have a "resonance frequency." > Hi all, my name is nanggroe, I am a research student in Acoustics Lab. > Univ. Technology Malaysia.I am a new comer here.. nice to join with you [quoted text clipped - 5 lines] > airgap, not helmholtz resonator). I will thank you very much for > helping me solving this.. |
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