Abstract
The form function of an elastic target can be obtained from the scattered signal through a deconvolution process. The deconvolution process uses the signal measured from an acoustically hard target (reference signal) to compensate for the impulse response of the measurement system. In this paper, it is shown that this approach limits the usable frequency range of the signal and leads to inaccuracies in the final results. An alternative approach is proposed in which the reference signal is replaced by the specular echo. A procedure is described for extracting the specular echo from the measured signal even in cases where it is not completely isolated from the resonant components. Modifications are made to the existing deconvolution formulation and it is further extended to be applicable to multiple scattering measurements. Experimental results show that the new approach provides improved accuracy and wider usable frequency range in both single and multiple scattering experiments.
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Sodagar, S., Honarvar, F., Yaghootian, A. et al. An alternative approach for measuring the scattered acoustic pressure field of immersed single and multiple cylinders. Acoust. Phys. 57, 411–419 (2011). https://doi.org/10.1134/S1063771011030201
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DOI: https://doi.org/10.1134/S1063771011030201