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May6-04, 11:40 AM
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?
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.