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Acoustic scattering characteristics of pelagic and coastal nekton
The Journal of the Acoustical Society of America, 2014Measurements of several acoustic scattering characteristics were made for a variety of different nekton. At-sea broadband high-frequency (100s to 1000s kHz) backscatter measurements were made on several species of myctophids and other types of pelagic nekton (e.g. fish, shrimp). Animals were caught in mid-water trawls off the coast of Oregon during the
Joseph Warren +3 more
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Acoustic scattering characteristics of Penrose-tiling-type diffusers
Applied Acoustics, 2018Abstract Periodic surfaces involve strong dependence of incidence angle and frequency on scattering directivity, which can be harmful to auditory tonal impressions in room acoustics, while non-periodic surfaces have potential in yielding uniform directivity and moderate frequency characteristics.
Hyojin Lee +2 more
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Simulation and experimental studies on acoustic scattering characteristics of surface targets
Applied Acoustics, 2018Abstract Based on the Kirchhoff approximation, a prediction method on the echo characteristics of surface targets was presented, considering the reflection effect of water surface. Specifically, the performance of this proposed approach was evaluated with acoustic scattering by a rigid semi-submerged sphere.
Zilong Peng, Bin Wang, Jun Fan
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Vertical structure of the acoustic characteristics of deep scattering layers in the ocean
Acoustical Physics, 2000Quantitative data on the vertical structure of the acoustic characteristics of deep scattering layers in the ocean are obtained for the first time from multiple full-scale measurements. The measurement procedure used to obtain the acoustic data for thousands of geographic points of the World Ocean in the frequency range from 3 to 20 kHz is briefly ...
I. B. Andreeva +2 more
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Characteristics of surface scattering of very high frequency acoustic signals
Journal of the Acoustical Society of America, 2016Many applications of acoustics in harbors are characterized by relatively shallow sources and receivers and a sound speed profile that does not strongly refract signals away from the surface. Therefore, surface scattering is an important factor in determining the characteristics of propagating signals in harbor environments.
James Preisig, Grant Deane
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Ultrasonics, 2007
The method of wave function expansion is adopted to study the scattering of a plane harmonic acoustic wave incident at an arbitrary angle upon an arbitrarily thick cylindrically orthotropic homogeneous cylindrical shell submerged in and filled with compressible ideal fluids.
Seyyed M, Hasheminejad, M, Rajabi
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The method of wave function expansion is adopted to study the scattering of a plane harmonic acoustic wave incident at an arbitrary angle upon an arbitrarily thick cylindrically orthotropic homogeneous cylindrical shell submerged in and filled with compressible ideal fluids.
Seyyed M, Hasheminejad, M, Rajabi
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Characteristics of Guided Acoustic Wave Brillouin Scattering in Polarization Maintaining Fibers
Optical Review, 1996Characteristics of guided acoustic wave Brillouin scattering in polarization maintaining fibers are investigated theoretically and experimentally. Spectra of polarized and depolarized scattering are measured for two different types of polarization maintaining fibers: the PANDA (polarization maintaining and absorption reducing) fibers and the elliptical-
Norihiko Nishizawa +4 more
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Characteristic analysis of underwater acoustic scattering echoes in the wavelet transform domain
Journal of Marine Science and Application, 2017Underwater acoustic scattering echoes have time–space structures and are aliasing in time and frequency domains. Different series of echoes properties are not identified when incident angle is unknown. This article investigates variations in target echoes of monostatic sonar to address this problem.
Mei Yang +3 more
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2019 IEEE International Conference on Signal, Information and Data Processing (ICSIDP), 2019
Target geometric configuration estimation is an important field in underwater target recognition. In this paper, the estimation of underwater target geometric configuration is studied combined with the joint characteristics in time domain and space domain of high frequency acoustic scattering.
Li Rui, An Junying, Cheng Gang
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Target geometric configuration estimation is an important field in underwater target recognition. In this paper, the estimation of underwater target geometric configuration is studied combined with the joint characteristics in time domain and space domain of high frequency acoustic scattering.
Li Rui, An Junying, Cheng Gang
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Numerical modeling of acoustic scattering characteristic with wavenumber domain admittance
INTER-NOISE and NOISE-CON Congress and Conference ProceedingsA conversion from the wavenumber domain acoustic reflection coefficient to the wavenumber domain acoustic admittance is formulated to deal with the acoustic reflection properties of arbitrary materials in numerical simulation. This method, which can represent arbitrary reflection directional properties, is an extended reactive boundary condition ...
Satoshi HOSHIKA +2 more
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