The establishment of a sound transmit model in micro-nano aperture membrane and experimental verification

We establish the sound absorption mode of micro-nano aperture membrane material according to the classic porous media acoustic theory and cylindrical shell model theory and considering the viscous resistance theory and the heat conduction theory as well. Comparing the theoretical result obtained by simulating the sound absorption property through Matlab and the experimental result, we prove the validity of the mode and it conforms to the sound absorption law of the porous material. We predict the Acoustic Propagation roperties of ordered mesoporous thin film using this mode and find the absorption coefficient is very small and the absorption property of the micro-nano aperture membrane is poor.