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Surface wave generation by comb transducers |
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| Authors: | A Penttinen M Luukkala |
| Institution: | * The authors are in the Department of Physics, University of Helsinki, Siltavuorenpenger 20 C, 00170, Helsinki 17, Finland |
| Abstract: | Low-frequency surface waves for non-destructive testing of surfaces can be excited by a so-called comb transducer consisting of a periodically corrugated plate bonded to a pie-zoelectric crystal. Typically, 25 dB insertion loss was measured at 3 MHz on an iron surface with a unidirectional set of transducers employing passive reflectors. |
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