Nonlinear Acoustic NDE: Inherent Potential of Complete Nonclassical Spectra

2006 ◽  
pp. 467-486 ◽  
Author(s):  
I. Solodov ◽  
K. Pfleiderer ◽  
G. Busse
Keyword(s):  
Nonlinear Acoustic

scholarly journals Experimental realization of a nonlinear acoustic lens with a tunable focus

2014 ◽  
Vol 104 (1) ◽  
pp. 014103 ◽  
Author(s):  
Carly M. Donahue ◽  
Paul W. J. Anzel ◽  
Luca Bonanomi ◽  
Thomas A. Keller ◽  
Chiara Daraio
Keyword(s):  
Experimental Realization ◽  
Acoustic Lens ◽  
Nonlinear Acoustic

“HIFU beam”: a Simulator for Predicting Axially Symmetric Nonlinear Acoustic Fields Generated by Focused Transducers in a Layered Medium

2021 ◽  
pp. 1-1
Author(s):  
Petr V. Yuldashev ◽  
Maria M. Karzova ◽  
Wayne Kreider ◽  
Pavel B. Rosnitskiy ◽  
Oleg A. Sapozhnikov ◽  
...  
Keyword(s):  
Layered Medium ◽  
Acoustic Fields ◽  
Axially Symmetric ◽  
Nonlinear Acoustic ◽  
Focused Transducers

A block-based combined scheme exploiting sparsity in nonlinear acoustic echo cancellation

2016 ◽  
Author(s):  
Danilo Comminiello ◽  
Michele Scarpiniti ◽  
Luis A. Azpicueta-Ruiz ◽  
Jeronimo Arenas-Garcia ◽  
Aurelio Uncini
Keyword(s):  
Echo Cancellation ◽  
Acoustic Echo Cancellation ◽  
Acoustic Echo ◽  
Nonlinear Acoustic ◽  
Block Based

scholarly journals Linear and nonlinear acoustic propagation in a periodic waveguide

1990 ◽  
Vol 87 (S1) ◽  
pp. S113-S113
Author(s):  
Charles E. Bradley
Keyword(s):  
Acoustic Propagation ◽  
Periodic Waveguide ◽  
Nonlinear Acoustic ◽  
Linear And Nonlinear

Propagation of nonlinear acoustic waves in bimodular media with linear dissipation

Wave Motion ◽  
2013 ◽  
Vol 50 (2) ◽  
pp. 191-196 ◽  
Author(s):  
A. Radostin ◽  
V. Nazarov ◽  
S. Kiyashko
Keyword(s):  
Acoustic Waves ◽  
Nonlinear Acoustic ◽  
Bimodular Media

Sub-array equalization technique for the parametric array loudspeaker to reduce nonlinear distortion

2021 ◽  
Vol 263 (5) ◽  
pp. 1497-1504
Author(s):  
Chi Zhang ◽  
Jing Ren ◽  
Chuang Shi
Keyword(s):  
Nonlinear Distortion ◽  
Ultrasonic Transducer ◽  
Previous Method ◽  
Ultrasonic Transducers ◽  
Acoustic Effect ◽  
The Past ◽  
Comparison Results ◽  
Equalization Technique ◽  
Nonlinear Acoustic ◽  
Parametric Array

The parametric array loudspeaker (PAL) is a directional loudspeaker which uses the nonlinear acoustic effect, namely the parametric array, to produce an audio beam from narrow ultrasonic beams. The PAL can efficiently deliver audible information, without generating noise to the surroundings. One significant drawback of the PAL is the nonlinear distortion. Therefore, many sophisticated methods have been proposed to preprocess the input signal of the PAL. However, those methods usually request a flat frequency response of the ultrasonic transducer array (UTA). In the past, equalization has been tried out for the whole UTA, but the performance was sometimes not satisfactory due to the inconsistent productions of ultrasonic transducers. This paper proposes to group the ultrasonic transducers by their impedances. Several sub-arrays are thereafter formed and equalized individually. The comparison results demonstrate that the propose sub-array equalization technique can suppress the nonlinear distortion of the PAL more effectively than the previous method.

Nonlinear Acoustic Echo Canceller to Combat Sigmoid-Type Nonlinearities Under Noisy Environment

2020 ◽  
Vol 114 (4) ◽  
pp. 3489-3506
Author(s):  
Amit Kumar Kohli ◽  
Jashu Sharma
Keyword(s):  
Noisy Environment ◽  
Echo Canceller ◽  
Acoustic Echo ◽  
Nonlinear Acoustic

Nonlinear acoustic characterization of micro-damaged materials through higher harmonic resonance analysis

2012 ◽  
Vol 45 (1) ◽  
pp. 1-8 ◽  
Author(s):  
A. Novak ◽  
M. Bentahar ◽  
V. Tournat ◽  
R. El Guerjouma ◽  
L. Simon
Keyword(s):  
Resonance Analysis ◽  
Acoustic Characterization ◽  
Nonlinear Acoustic ◽  
Higher Harmonic ◽  
Harmonic Resonance ◽  
Damaged Materials
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