Dolphin and bat sonar: Nonlinear acoustic effects

2018 ◽  
Vol 144 (3) ◽  
pp. 1775-1776
Author(s):  
Thomas G. Muir ◽  
Jack A. Shooter ◽  
Mark F. Hamilton
Keyword(s):  
Nonlinear Acoustic ◽  
Bat Sonar

Principles of Perception in Bat Sonar

1994 ◽  
Author(s):  
James A. Simmons
Keyword(s):  
Bat Sonar

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

Evidence for a spectral basis of texture perception in bat sonar

Nature ◽  
1988 ◽  
Vol 331 (6157) ◽  
pp. 617-619 ◽  
Author(s):  
Sabine Schmidt
Keyword(s):  
Texture Perception ◽  
Bat Sonar

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.

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