Archivio Istituzionale della RicercaThe efficiency of time reversal acoustics may be strongly affected by attenuation in the presence of a very low Q-factor. This is particularly true when one-channel time reversal is implemented, taking advantage of virtual sources corresponding to the coda of the signal. To face this issue, in this paper, a procedure is proposed, which properly amplifies the recorded signals before back-propagation, in order to optimize both the quality of the focusing, in terms of signal-to-noise ratio, and the symmetry of the reconstructed signal.
One-channel time reversal acoustics in highly attenuating media / Gliozzi, Antonio; Scalerandi, Marco; Antonaci, Paola. - In: JOURNAL OF PHYSICS D. APPLIED PHYSICS. - ISSN 0022-3727. - 46:(2013), p. 135502. [10.1088/0022-3727/46/13/135502]
One-channel time reversal acoustics in highly attenuating media
GLIOZZI, ANTONIO;SCALERANDI, MARCO;ANTONACI, PAOLA
2013
Abstract
The efficiency of time reversal acoustics may be strongly affected by attenuation in the presence of a very low Q-factor. This is particularly true when one-channel time reversal is implemented, taking advantage of virtual sources corresponding to the coda of the signal. To face this issue, in this paper, a procedure is proposed, which properly amplifies the recorded signals before back-propagation, in order to optimize both the quality of the focusing, in terms of signal-to-noise ratio, and the symmetry of the reconstructed signal.
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https://hdl.handle.net/11583/2506206
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