Search Results - "Spiesberger, John L."

Confidence intervals of location for marine mammal calls via time-differences-of-arrival: Sensitivity analysis by Mathur, Maya, Spiesberger, John L, Pascoe, Devin

“…Confidence intervals of location (CIL) of calling marine mammals, derived from time-differences-of-arrival (TDOA) between receivers, depend on errors of TDOAs,…”
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Bounding the number of calling animals with passive acoustics and reliable locations by Spiesberger, John L., Berchok, Catherine, Iyer, Pranav, Schoeny, Alexander, Sivakumar, Krishna, Woodrich, Daniel, Yang, Eloise, Zhu, Sophia

“…When n animal calls are passively detected at n different times, the number of animals producing the sounds is anywhere between one and n unless more…”
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Determining probability distribution of coherent integration time near 133 Hz and 1346 km in the Pacific Ocean by Spiesberger, John L

“…The hypothesis tested is that internal gravity waves limit the coherent integration time of sound at 1346 km in the Pacific ocean at 133 Hz and a pulse…”
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Where the ocean influences the impulse response and its effect on synchronous changes of acoustic travel time by Spiesberger, John L.

“…In 1983, sounds at 133Hz, 0.06s resolution were transmitted in the Pacific for five days at 2min intervals over 3709km between bottom-mounted instruments…”
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Temporal and spatial coherence of sound at 250 Hz and 1659 km in the Pacific Ocean: Demonstrating internal waves and deterministic effects explain observations by Spiesberger, John L.

“…The hypothesis tested is that internal gravity waves explain temporal and spatial coherences of sound at 1659 km in the Pacific Ocean for a signal at 250 Hz…”
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Internal Waves' Role in Determining Probability Distribution of Coherent Integration Time Near 133 Hz and 3709 km in North Pacific Ocean by Spiesberger, J. L.

“…The hypothesis tested is that internal gravity waves limit the coherent integration time of sound at 3709 km in the Pacific ocean at 133 Hz and a pulse…”
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Comparison of measured and modeled temporal coherence of sound near 75 Hz and 3683 km in the Pacific Ocean by Spiesberger, John L.

“…The hypothesis to test is internal gravity waves following a Garrett-Munk spectrum are sufficient to explain temporal coherence of sound at 3683 km in the…”
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Regions that influence acoustic propagation in the sea at moderate frequencies, and the consequent departures from the ray-acoustic description by Spiesberger, John L.

“…In the limit where a transient signal is comprised of very large frequencies, spatial regions within an inhomogeneous medium that influence the propagation…”
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Probability distributions for locations of calling animals, receivers, sound speeds, winds, and data from travel time differences by SPIESBERGER, John L

“…A new nonlinear sequential Monte Carlo technique is used to estimate posterior probability distributions for the location of a calling animal, the locations of…”
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Geometry of locating sounds from differences in travel time: Isodiachrons by SPIESBERGER, John L

“…Calling animals may be located from measurements of the differences in acoustic travel time at pairs of receivers. For inhomogeneous fields of speed, locations…”
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Probability density functions for hyperbolic and isodiachronic locations by Spiesberger, John L, Wahlberg, Magnus

“…Animal locations are sometimes estimated with hyperbolic techniques by estimating the difference in distances of their sounds between pairs of receivers. Each…”
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High-sensitivity photoacoustic leak testing by Huang, Eric, Dowling, David R, Whelan, Timothy, Spiesberger, John L

“…The photoacoustic effect may be exploited for the detection and localization of gas leaks from otherwise sealed components. The technique involves filling the…”
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U.S. Navy sources and receivers for studying acoustic propagation and climate change in the ocean by Spiesberger, John L

“…Sounds from a U.S. Navy SSQ-110A source are received at high signal-to-noise ratios at ocean-basin scales at two Sound Surveillance Systems in the Pacific. The…”
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Study of a novel range-dependent propagation effect with application to the axial injection of signals from the Kaneohe source by Tappert, Frederick D, Spiesberger, John L, Wolfson, Michael A

“…A novel range-dependent propagation effect occurs when a source is placed on the seafloor in shallow water with a downward refracting sound speed profile, and…”
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Blind prediction of broadband coherence time at basin scales by Spiesberger, John L, Tappert, Frederick, Jacobson, Andrew R

“…A blind comparison with data is made with a model for the coherence time of broadband sound (133 Hz, 17-Hz bandwidth) at 3709 km. Coherence time is limited by…”
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Time domain analysis of normal mode, parabolic, and ray solutions of the wave equation by BODEN, L, BOWLIN, J. B, SPIESBERGER, J. L

“…Estimation of sound speed and temperature fields from tomographic data requires knowledge of the accuracy of the forward model. For this reason, time domain…”
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New full-wave approximation for ocean acoustic travel time predictions by Tappert, Frederick, Spiesberger, John L., Boden, Linda

“…A new full-wave parabolic approximation is introduced that is valid for a wide range of grazing angles. By Fourier synthesis it yields travel times of ocean…”
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Passive Localization of Calling Animals and Sensing of their Acoustic Environment Using Acoustic Tomography by Spiesberger, John L., Fristrup, Kurt M.

“…When monitored by several acoustic receivers, the sounds emitted by terrestrial and marine animals can be used to localize their positions. The localization…”
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Kaneohe acoustic thermometer further validated with rays over 3700 km and the demise of the idea of axially trapped energy by Spiesberger, J L, Tappert, F D

“…The Kaneohe acoustic source transmitted 133-Hz, 60-ms resolution signals over 3709 km from Oahu at 183-m depth to a Naval receiver at 1433-m depth near…”
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Observations of El Niño-Southern Oscillation induced Rossby waves in the northeast Pacific using in situ data by Jacobson, Andrew R., Spiesberger, John L.

“…Bathythermometric observations from standard National Oceanographic Data Center data sets are used to show evidence of Rossby waves in the northeast Pacific…”
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