An experimental technique for measuring the acoustic scattering from bodies over a range of frequencies from approximately 100 kHz to 3 MHz is described. A compact arrangement comprising a large‐area piezoelectric transmitter in conjunction with an acoustic lens allows scattering measurements to be made from the near to the far field in a laboratory water tank. An approximation to plane‐wave or point‐source insonification is achieved by the selection of an appropriate single or compound lens, respectively. Experimental results are compared with predictions for the scattering from a cylinder insonified normal to its axis. Results are also presented for monostatic scattering from a more complex body as a function of aspect angle. The technique has been found to be useful for the validation of computer or other models of scattering and for scale‐model measurements.
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May 1994
May 01 1994
Scattered field distributions from the near to the far field using an acoustic lens
Ross McLeary;
Ross McLeary
Department of Defence, DSTO Materials Research Laboratory, P.O. Box 50, Ascot Vale, Victoria, 3032, Australia
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Russell E. Whitcher;
Russell E. Whitcher
Department of Defence, DSTO Materials Research Laboratory, P.O. Box 50, Ascot Vale, Victoria, 3032, Australia
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Ian R. MacGillivray
Ian R. MacGillivray
Department of Defence, DSTO Materials Research Laboratory, P.O. Box 50, Ascot Vale, Victoria, 3032, Australia
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J. Acoust. Soc. Am. 95, 2560–2566 (1994)
Article history
Received:
July 23 1993
Accepted:
December 15 1993
Citation
Ross McLeary, Russell E. Whitcher, Ian R. MacGillivray; Scattered field distributions from the near to the far field using an acoustic lens. J. Acoust. Soc. Am. 1 May 1994; 95 (5): 2560–2566. https://doi.org/10.1121/1.409825
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