Zobrazeno 1 - 10
of 71
pro vyhledávání: '"R. Alfred Saenger"'
Autor:
R. Alfred Saenger, Albert L. Brooks
Publikováno v:
Canadian Journal of Fisheries and Aquatic Sciences. 48:694-721
The nighttime (N) and daytime (D) size–depth distributions of mesopelagic fish at Ocean Acre, a typical deepwater site in the North Sargasso Sea, are described using archival discrete-depth data from the surface to about 1500 m. The N/D abundance d
Autor:
R. Alfred Saenger
Publikováno v:
The Journal of the Acoustical Society of America. 84:1007-1017
Bioacoustic predictions of volume scattering strength Sv(z, f ) below 20 kHz due to mesopelagic swimbladdered fish contain errors arising from biological sampling limitations and uncertainties in swimbladder target strength. These predictions all uti
Autor:
George E. Hudson, R. Alfred Saenger
Publikováno v:
The Journal of the Acoustical Society of America. 32:961-970
When an oscillating piston forces the enclosed gas in a Kundt tube to vibrate with a finite amplitude near an acoustic resonance frequency of the gas column, shock waves are generated which travel periodically back and forth in the tube. There is als
Autor:
M. Vertner Brown, R. Alfred Saenger
Publikováno v:
The Journal of the Acoustical Society of America. 52:944-960
The bistatic scattering strength S(φi,φs) = 10 logs (φi,φs) of the ocean surface has been measured in 12‐oct bands over the frequency range 62.5–4000 Hz for a wide range of grazing angles of incidence and scattering, φi and φs. Explosive ch
Autor:
Morton R. Lomask, R. Alfred Saenger
Publikováno v:
The Journal of the Acoustical Society of America. 32:878-883
Background noise spectra from 11–250 cps have been obtained in a deep inland lake in the absence of wind, waves, shipping, and marine life. An upper estimate of the spectrum level is given. It is 10 db lower than that of the Knudsen zero sea‐stat
Autor:
R. Alfred Saenger
Publikováno v:
The Journal of the Acoustical Society of America. 54:289-290
A theory employing the Kirchhoff approximation and other physical assumptions has been used to obtain a theoretical expression for bistatic surface scattering strength 10 log s(φi,φs) appropriate for the case of a vertically suspended separated sou
Autor:
R. Alfred Saenger
Publikováno v:
The Journal of the Acoustical Society of America. 36:1987-1988
The Kirchhoff approximation has been used in deriving the reverberant tail ps, which results when a short spherical pulse of strength F(t) backscatters from a rough pressure‐release surface. The amplitudes of the differential scattered pulselets pr
Autor:
R. Alfred Saenger
Publikováno v:
The Journal of the Acoustical Society of America. 32:1497-1498
At the last meeting it was shown that a sequence of water waves breaking on the shore at periodic intervals generates a corresponding sequence of elastic pulses, or surfseisms, in the adjoining beach. Analysis of the amplitude distribution and power
Autor:
R. Alfred Saenger
Publikováno v:
The Journal of the Acoustical Society of America. 33:1674-1675
At previous meetings it was shown that when a water wave breaks onshore a seismic pulse, or “surfseism,” is communicated to the sandy bottom. The spectral character of pulses measured on the beach at Fire Island, New York, were accounted for in t
Autor:
R. Alfred Saenger
Publikováno v:
The Journal of the Acoustical Society of America. 64:S97-S97
The purpose of this paper is to present a fundamental bioacoustic interpretation of the isolume model [J. Acoust. Soc. Am. 62, S1(A) (1977) CC10] which clarifies the physical significance of model parameters and defines the bioacoustic conditions und