Parameter sensitivity in nonlinear and dissipative time-reversed acoustics

Document type: Conference Papers
Peer reviewed: Yes
Full text:
Author(s): Claes Hedberg
Title: Parameter sensitivity in nonlinear and dissipative time-reversed acoustics
Translated title: Parameterkänslighet i ickelinjär och dissipativ tidsomvänd akustik
Conference name: 16th Int. Congress on Acoustics and 135th Meeting of Acoust. Soc. of Am.
Year: 1998
Pagination: 543-544
ISBN: 1-56396-815-0
Publisher: Acoust. Soc. of Am.
City: Seattle, WA
Organization: Blekinge Institute of Technology
Department: Dept. of Mechanical Engineering (Institutionen för maskinteknik)
Dept. of Mechanical Engineering S-371 79 Karlskrona
+46 455 780 00
Authors e-mail:
Language: English
Abstract: Time-reversed nonlinear acoustics has shown that a propagated
signal retains information about the original signal after shock
formation and even after merging of shocks. This information is
dependent on the accuracy of the measured or calculated data .
Presented here is a more detailed analysis of the estimation of
dimensionless and real parameters in the problem - the original
amplitude, the distance traveled and the dissipation over non-
linearity ratio. It is shown that the methods are fairly insensitive
to noise.
Summary in Swedish: Tidsomvänd ickelinjär akustik har visat att a signal kvarhåller information om dess begynnelsetillstånd till och med efter sammangående av stötarna. Här visas hur parametrarna i problemet kan uppskattas: begynnelseamplituden, fortplantningsavståndet och förhållandet mellan dämpning och ickelinjaritet.
Subject: Mechanical Engineering\Structural Dynamics
Signal Processing\Detection and Classification
Signal Processing\Hydro-Acoustics
Keywords: timereversal, backpropagation, acoustics, nonlinear