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ECM microphone simulation problem

Posted Jul 8, 2022, 6:11 a.m. EDT Structural & Acoustics, Acoustics & Vibrations Version 5.3a 1 Reply

宇宣 林
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Hello everyone,

I'm trying to simulate the directivity pattern of uni-directional ECM microphone but using the opposite way to do it.

My method is adding the acceleration boundary on the diaphragm on the ECM instead using a external sound source, I heard that this method is called "Reciprocal Theorem", but after several tests, the simulation result still can't fit the experiment result.

I'm wondering that is the "Reciprocal Theorem" not work here or there are something I missed.

Thank you in advanced.

1 Reply Last Post Jul 9, 2022, 7:18 a.m. EDT
Acculution ApS Certified Consultant
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Posted: 2 years ago Jul 9, 2022, 7:18 a.m. EDT

Most likely a displacement condition would more in line with the membrane movement for a constant (as function of frequency) pressure.

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René Christensen, PhD
Acculution ApS
www.acculution.com
info@acculution.com
Most likely a displacement condition would more in line with the membrane movement for a constant (as function of frequency) pressure.

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