Basics of Nonlinear Time Reversal Acoustics
| Document type: | Conference Papers |
|---|---|
| Peer reviewed: | Yes |
| Author(s): | Claes Hedberg |
| Title: | Basics of Nonlinear Time Reversal Acoustics |
| Conference name: | 3rd Conference on Mathematical Modeling of Wave Phenomena/20th Nordic Conference on Radio Science and Communications |
| Year: | 2009 |
| Volume: | 1106 |
| Pagination: | 164-172 |
| ISBN: | 978-0-7354-0643-8 |
| Publisher: | AMER INST PHYSICS |
| City: | Vaxjo, SWEDEN |
| ISI number: | 000264867300018 |
| Organization: | Blekinge Institute of Technology |
| Department: | School of Engineering - Dept. of Mechanical Engineering (Sektionen för teknik – avd. för maskinteknik) School of Engineering S- 371 79 Karlskrona +46 455 38 50 00 http://www.bth.se/ing/ |
| Language: | English |
| Abstract: | An investigation of time reversal of nonlinear and non-dissipative or dissipative plane sound waves was made. Propagation and back propagation is time reversal invariant only when the dissipation is zero and the wave has not been shocked. A wave that has shocked has irretrievably lost part of its content. Still, if the wave and its derivatives are considered continuous there remain in theory forever information about the original signal. Factors like numerical accuracy and noise naturally set limits in practical situations. |
| Subject: | Mechanical Engineering\General |
| Keywords: | Acoustic time reversal, acoustic back propagation, nonlinear attenuation, shock front reversal |
