Resonance scattering of sound by a small gaseous object of arbitrary form
Citable URI
https://hdl.handle.net/1912/25252DOI
10.1575/1912/25252Keyword
Sound; Integral equationsAbstract
The acoustic scattering amplitude for a dilute gaseous object of arbitrary form in a liquid medium is determined self-consistently for the case of linear dimension small as compared to the wavelength. A scatterer of bulk modulus β, and density p, in a medium of bulk modulus II and density p may exhibit monopole resonance scattering at a frequency w,= (4πβoC / pV)l, in which V is the volume and C is the capacitance in electrostatic units of a conducting replica of the scatterer. The criterion for occurrence of the resonance phenomenon is 3Fβo/β <<«1, in which the shape factor F = 4πC3 / 3V> 1 is minimum for a sphere. Dipole scattering is given in terms of the polarizability dyadic of a nonconducting replica of dielectric constant p/po, and is negligibly small in a neighborhood of the resonance frequency.
Collections
Suggested Citation
Steinberg, M. S. (1968). Resonance scattering of sound by a small gaseous object of arbitrary form. Woods Hole Oceanographic Institution. https://doi.org/10.1575/1912/25252Related items
Showing items related by title, author, creator and subject.
-
Hearing abilities and sound reception of broadband sounds in an adult Risso’s dolphin (Grampus griseus )
Mooney, T. Aran; Yang, Wei-Cheng; Yu, Hsin-Yi; Ketten, Darlene R.; Jen, I-Fan (2015-04)While odontocetes do not have an external pinna that guides sound to the middle ear, they are considered to receive sound through specialized regions of the head and lower jaw. Yet odontocetes differ in the shape of the ... -
Differences between sound scattering by weakly scattering spheres and finite-length cylinders with applications to sound scattering by zooplankton
Stanton, Timothy K.; Wiebe, Peter H.; Chu, Dezhang (Acoustical Society of America, 1998-01)A modeling study was conducted to determine the conditions under which fluidlike zooplankton of the same volume but different shapes (spherical/cylindrical) have similar or dramatically different scattering properties. ... -
Seafloor character and sedimentary processes in eastern Long Island Sound and western Block Island Sound
Poppe, Lawrence J.; DiGiacomo-Cohen, M. L.; Smith, Shepard M.; Stewart, H. F.; Forfinski, N. A. (2005-07-26)Multibeam bathymetric data and seismic-reflection profiles collected in eastern Long Island and western Block Island Sounds reveal previously unrecognized glacial features and modern bedforms. Glacial features include ...