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Help needed with model to find acoustic transmission loss of a membrane.

Posted Aug 19, 2014, 2:57 a.m. EDT Acoustics & Vibrations, Electrochemistry, Structural Mechanics Version 4.3a 1 Reply

Tim Harley
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I've been trying to 2 weeks now to get this model working with no joy so far.

It's a membrane with a mass attached to the centre. I have YM, PR & density for membrane & mass.

I need to calculate the transmission loss the membrane+mass provides to acoustic waves that pass through the membrane+mass.

I've tried to replicate an impedance tube within comsol using a long cuboid shape with the membrane-mass half way along. I've used 26 PMLs surrounding the cuboid to get rid of reflections.

I've been using intop1 & intop2 with either a plane wave radiation source on the source side wall, or a background field (the domain before the membrane-mass).

I've also read somewhere about adding face loads to the membrane-mass.

Any help in getting this model to work would be hugely beneficial,

Thanks



1 Reply Last Post Jan 11, 2015, 7:42 a.m. EST
COMSOL Moderator

Hello Tim Harley

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Meng Chen
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Posted: 10 years ago Jan 11, 2015, 7:42 a.m. EST
Hello! Do you have to solve this problem? When i calculated the transmission loss of a membrane, I meet the same quenstion. Can you help me to introduce how to solve this problem.
Thanks!
Hello! Do you have to solve this problem? When i calculated the transmission loss of a membrane, I meet the same quenstion. Can you help me to introduce how to solve this problem. Thanks!

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