 Quote by alpha_wolf
It has been mentioned in one of the other forums that different materials absorb different sound frequencies, and a suggestion was raised to use that for material analysis. Is this sort of testing actually being done? If so, what information can be found about the material this way?
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Er.... you have heard of the widely-used ultrasound scan on a fetus during pregnancy, haven't you? It's the same principle done on materials.
Zz.