SOUND SCATTERING BY A HARD HALF-PLANE: EXPERIMENTAL EVIDENCE OF THE EDGE-DIFFRACTED WAVE
✍ Scribed by D. OUIS
- Publisher
- Elsevier Science
- Year
- 2002
- Tongue
- English
- Weight
- 150 KB
- Volume
- 252
- Category
- Article
- ISSN
- 0022-460X
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✦ Synopsis
In this short note, some experimental results are presented on the di!raction of a spherical way by a hard half-plane. This study was conducted with the aim to give evidence to the existence of the edge-di!racted wave. The sound source used in this experimental study is a condenser microphone operating in a reverse way. The wave emitted by a sound source propagates in space and hits a thin aluminium sheet with a straight edge, considered as an idealization of the hard half-plane. The resulting impulse response includes among others a wave di!racted by the edge of the half-plane, which is compared to its theoretical prediction. This latter is calculated from the exact Biot and Tolstoy solution to the problem of di!raction of a spherical wave by a hard wedge. Relatively satisfactory agreement is found between theory and experiment.