Keywords
time reversal, elastic waves, continuous-wave, steady-state signals
Abstract
Experimental observations of spatial focusing of continuous-wave, steady-state elastic waves in a reverberant elastic cavity using time reversal are reported here. Spatially localized focusing is achieved when multiple channels are employed, while a single channel does not yield such focusing. The amplitude of the energy at the focal location increases as the square of the number of channels used, while the amplitude elsewhere in the medium increases proportionally with the number of channels used. The observation is important in the context of imaging in solid laboratory samples as well as problems involving continuous-wave signals in Earth.
Original Publication Citation
B. E. Anderson, R. A. Guyer, T. J. Ulrich, and P. A. Johnson, "Time reversal of continuous-wave, steady-state signals in elastic media," Appl. Phys. Lett., 94, 11198 (29).
BYU ScholarsArchive Citation
Anderson, Brian E.; Guyer, Robert A.; Johnson, Paul A.; and Ulrich, Timothy J., "Time Reversal of Continuous-Wave, Steady-State Signals in Elastic Media" (2009). Faculty Publications. 857.
https://scholarsarchive.byu.edu/facpub/857
Document Type
Peer-Reviewed Article
Publication Date
2009
Permanent URL
http://hdl.lib.byu.edu/1877/2178
Publisher
American Institute of Physics
Language
English
College
Physical and Mathematical Sciences
Department
Physics and Astronomy
Copyright Status
© 2009 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters, 94, 111908 (2009) and may be found at http://dx.doi.org/10.1063/1.3097811.
Copyright Use Information
http://lib.byu.edu/about/copyright/