One-channel time-reversal acoustics in highly attenuating media

被引：7
|
作者：
Gliozzi, A. S. [1 ]
Scalerandi, M. [1 ]
Antonaci, P. [2 ]
机构：
[1] Politecn Torino, Dept Appl Sci & Technol, Inst Condensed Matter Phys & Complex Syst, Turin, Italy
[2] Politecn Torino, Dept Struct Geotech & Bldg Engn, Turin, Italy
来源：
JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2013年 / 46卷 / 13期
关键词：
PROPAGATION; LOCALIZATION; PULSES; SOLIDS;
D O I：
10.1088/0022-3727/46/13/135502
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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.
引用
收藏
页数：8
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