Development of methods to deconvolve data from instrumental devices: Application to acoustic experiments
Résumé
we propose two methods to deconvolve experimental data from the distorsions introduced by intrumental devices. If we suppose the total acquisition system (emission-reception line, amplifier, pre-amplifier) as a global experimental filter, we can define it experimentally from the generation of a family of source signals dilated in time. The estimation of this filter allows us to deconvolve the recorded output signal. The first approach is based on the simple reconstruction formula of the continuous wavelet transform. The second method is based on the construction of a normalized family of a finite number of specific filters, independent of the frequency range used. In both case, experimental results in an acoustic tank are presented. We show that after deconvolution, the source signal is correctly reconstructed from the recorded output signal and the global instrumental filter.
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