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On The Use of a Diffusion Equation Model for Sound Energy Flow Prediction in Acoustically Coupled Spaces

Y. Jing, and N. Xiang
Rensselaer Polytechnic Institute, Troy, NY, USA
发布日期 2008

This paper studies sound energy flows through an aperture across two coupled spaces using a diffusion equation model. The so-called double sloped sound energy decay is believed to be caused by the sound energy exchange through the aperture coupling the two rooms.

The room diffusion equation is first solved by COMSOL, then the time dependent energy flow is visualized via COMSOL arrow plotting, which reveals the sound energy feedback through the aperture. In addition, this study also discloses a “flipping-over” characteristic of the energy flow decay which is shown to be highly dependent on the size and the location of the aperture.

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