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Interference of Echo Signals from Spherical Scatterers Located Near the Bottom.

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Title: Interference of Echo Signals from Spherical Scatterers Located Near the Bottom.
Authors: Grigorieva, N. S.1 (AUTHOR) nsgrig@natalie.spb.su, Legusha, F. F.1 (AUTHOR) legusha@smtu.ru, Safronov, K. S.1 (AUTHOR) safronov.kirill.pm@gmail.com
Source: Acoustical Physics. Jun2024, Vol. 70 Issue 3, p416-423. 8p.
Subjects: Sound wave scattering, Spherical functions, Spheres, Wavelengths, Signals & signaling
Abstract: Abstract—The influence of the bottom on an echo signal from spherical scatterers is studied. The bottom is modeled by a liquid absorbing half-space. The emitter/receiver is located in the aqueous half-space. The distance between the emitter/receiver and scatterer is assumed to be large compared to the acoustic wavelengths in the water and bottom. Numerical results are obtained for acoustically rigid spherical scatterers with the same radius. The interaction between scatterers is not taken into account. The echo signal from one sphere in a wide frequency range is calculated using the method proposed in papers by R.H. Hackman and G.S. Sammelmann, an important step in the implementation of which is calculation of the scattering coefficients of the sphere. To calculate them, the authors use asymptotic formulas obtained with the saddle point method. The resulting asymptotic expressions for the scattering coefficients of the sphere make it possible to significantly reduce the number of terms in the formula for the echo signal form function. [ABSTRACT FROM AUTHOR]
Copyright of Acoustical Physics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Abstract—The influence of the bottom on an echo signal from spherical scatterers is studied. The bottom is modeled by a liquid absorbing half-space. The emitter/receiver is located in the aqueous half-space. The distance between the emitter/receiver and scatterer is assumed to be large compared to the acoustic wavelengths in the water and bottom. Numerical results are obtained for acoustically rigid spherical scatterers with the same radius. The interaction between scatterers is not taken into account. The echo signal from one sphere in a wide frequency range is calculated using the method proposed in papers by R.H. Hackman and G.S. Sammelmann, an important step in the implementation of which is calculation of the scattering coefficients of the sphere. To calculate them, the authors use asymptotic formulas obtained with the saddle point method. The resulting asymptotic expressions for the scattering coefficients of the sphere make it possible to significantly reduce the number of terms in the formula for the echo signal form function. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Acoustical Physics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1134/S1063771024601444
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      – Code: eng
        Text: English
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    Subjects:
      – SubjectFull: Sound wave scattering
        Type: general
      – SubjectFull: Spherical functions
        Type: general
      – SubjectFull: Spheres
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      – SubjectFull: Wavelengths
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      – TitleFull: Interference of Echo Signals from Spherical Scatterers Located Near the Bottom.
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              M: 06
              Text: Jun2024
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              Y: 2024
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