29 Mar
2007
29 Mar
'07
7:09 a.m.
Maybe this helps. ElectricPete offers a shortcut to the first two modes of a rectangular plate in terms of density, elasticity and two material constants.
http://www.eng-tips.com/viewthread.cfm?qid=150916&page=12
On Wed, 28 Mar 2007 10:12:32 -0500 "Charles Henry" czhenry@gmail.com wrote:
Robin -> 1st order differential equation (specifies a constant phase difference between incoming/reflected waves)
for accuracy sake.... the phase difference is dependent on frequency (it works like an impedance)
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