How do I get accurate pressure peaks (eigenvalues) versus frequency?
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Hello,
I am trying to measure acoustic eigenvalues by simulating impedance tubes.
For starters,I have a basic impedance tube as an acoustic body.
I have defined surface velocity of 0.01 mm/s and rediation boundary at the entrance.
Here are the results obtained under these conditions.
A point at the top of the tube was specified and measured.
In the experiment, resonance should occur and one or two clear peaks of eigenvalues should appear, but such a result is not obtained.
I have consulted many examples and tutorials, but I don't know where the flaw lies in this condition.
I seek help,thank you in advance.
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