Fluctuations of high‐frequency sound field in shallow water in the presence of internal waves

2004 ◽  
Vol 116 (4) ◽  
pp. 2534-2534
Author(s):  
Mohsen Badiey ◽  
Boris Katsnelson ◽  
Serguey Pereselkov
Keyword(s):  
Shallow Water ◽  
Internal Waves ◽  
High Frequency ◽  
Sound Field ◽  
High Frequency Sound ◽  
Frequency Sound

A high-precision reconstructing technique for a high-frequency acoustic field based on the angular spectrum method

2010 ◽  
Vol 225 (3) ◽  
pp. 745-753
Author(s):  
Y Shao ◽  
D Mei ◽  
Z Fan ◽  
K Yang
Keyword(s):  
High Precision ◽  
High Frequency ◽  
Sound Field ◽  
Angular Spectrum ◽  
Wave Number ◽  
Reconstruction Technique ◽  
High Frequency Sound ◽  
Frequency Sound ◽  
Spectrum Method ◽  
Angular Spectrum Method

To apply ultrasonic radiation force in precise manipulation for micro-components, a reconstruction technique for low-frequency sound field based on angular spectrum method (ASM) was adopted in the reconstruction for high-frequency sound field, and a high-precision reconstructing technique for high-frequency sound field was developed. First, the principle of reconstructing the sound field by ASM and four key factors on reconstruction precision were analysed. Second, the marginal Gibbs phenomenon and aperture replication effect were decreased by optimizing of the sampling interval and holographical aperture, and the signal-to-noise ratio (SNR) was increased by using the tapered filter to pretreat the signal data in wave number space. Then, the ill-posedness in reverse problem was eliminated by using a new kind of k-space filter to refine the transfer function. Finally, the reconstruction experiment of 1.75 MHz ultrasonic field was conducted by using the three-dimensional precise scanning system and needle-type hydrophone, and the experimental results validate the feasibility and efficiency of the method proposed in this study.

High-frequency sound field and bubble formation in a rat decompression model

2002 ◽  
Vol 28 (5) ◽  
pp. 655-660 ◽  
Author(s):  
Avi Shupak ◽  
Yehuda Arieli ◽  
Haim Bitterman ◽  
Vera Brod ◽  
Ran Arieli ◽  
...  
Keyword(s):  
High Frequency ◽  
Bubble Formation ◽  
Sound Field ◽  
High Frequency Sound ◽  
Frequency Sound

Effects of bubbles on high‐frequency sound propagation in very shallow water

1998 ◽  
Vol 103 (5) ◽  
pp. 2829-2829
Author(s):  
Paul A. Elmore ◽  
Jerald W. Caruthers ◽  
Stephen J. Stanic ◽  
Ralph R. Goodman
Keyword(s):  
Shallow Water ◽  
High Frequency ◽  
Sound Propagation ◽  
High Frequency Sound ◽  
Frequency Sound
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