Search Results - "Crocker, Steven"

Effects of Pile Driving on the Residency and Movement of Tagged Reef Fish by Iafrate, Joseph D, Watwood, Stephanie L, Reyier, Eric A, Scheidt, Douglas M, Dossot, Georges A, Crocker, Steven E

“…The potential effects of pile driving on fish populations and commercial fisheries have received significant attention given the prevalence of pile driving…”
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Geoacoustic inversion of ship radiated noise in shallow water using data from a single hydrophone by Crocker, Steven E, Nielsen, Peter L, Miller, James H, Siderius, Martin

“…The Centre for Maritime Research and Experimentation conducted a geoacoustic inverse experiment in the Mediterranean Sea in the summer of 2012. Among the…”
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Measurement of Sounds Emitted by Certain High-Resolution Geophysical Survey Systems by Crocker, Steven E., Fratantonio, Frank D., Hart, Patrick E., Foster, David S., O'Brien, Thomas F., Labak, Stanley

“…Scientific questions regarding the impact of anthropomorphic noise in the marine environment have resulted in an increasing number of regulatory requirements…”
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Calibration of a Digital Hydrophone Line Array at Low Frequency by Crocker, Steven E., Smalley, Ronald R.

“…The challenges of comparison calibrations of hydrophones in linear arrays at low frequencies are inherent in the length of the array, number of hydrophones,…”
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Residency of Reef Fish During Pile Driving Within a Shallow Pierside Environment by Iafrate, Joseph D, Watwood, Stephanie L, Reyier, Eric A, Gilchrest, Matthew, Crocker, Steven E

“…The potential effects of pile driving on fish populations and commercial fisheries have received significant attention given the prevalence of construction…”
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Nonlinear Inversion of Acoustic Scalar and Vector Field Transfer Functions by Crocker, S. E., Miller, J. H., Potty, G. R., Osler, J. C., Hines, P. C.

“…A study to investigate the use of the acoustic vector field, separately or in combination with the scalar field, to invert for geoacoustic properties of the…”
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Nonlinear optimization for beamforming a geometrically deficient vertical line array: Application to sediment tomography by Crocker, Steven E., Miller, James H., Potty, Gopu R., Lynch, James F.

“…The 1996 Shelfbreak PRIMER experiment included broadband acoustic transmissions in the vicinity of a shelfbreak front collected using a geometrically deficient…”
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Single element synthetic aperture using an ocean glider by Dossot, Georges A., Miller, James H., Moore, Kristy A., Crocker, Steven E., Holmes, Jason D., Glenn, Scott

“…The feasibility of using a single transducer element on an ocean glider to create a synthetic aperture is discussed. Acoustic data were collected on two Webb…”
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Propagation of impulsive broadband signals in a coastal ocean setting during the 1996 Shelfbreak Primer experiment by Crocker, Steven E., Miller, James H., Potty, Gopu R., Dossot, Georges A., Lynch, James F.

“…The 1996 Shelfbreak PRIMER experiment provided an opportunity to study the impulse response of a coastal ocean waveguide using broadband acoustic signals from…”
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Geoacoustic inversion using the vector field by Crocker, Steven E

“…The main goal of this project was to study the use of the acoustic vector field, separately or in combination with the scalar field, to estimate the depth…”
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Implementation of moving magnet actuation in very low frequency underwater acoustic transduction by Wallin, Brenton, Crocker, Steven, Szelag, Jeffrey

“…The Naval Undersea Warfare Center’s Underwater Sound Reference Division (USRD) is designing a very low frequency sound source to calibrate line arrays in the…”
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A primary method for the complex calibration of a hydrophone from 1 Hz to 2 kHz by Slater, William H., Crocker, Steven E., Baker, Steven R.

“…Primary calibrations of hydrophones at frequencies less than about 1 kHz are typically performed in a coupler reciprocity chamber (“coupler“); a closed test…”
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Implementing a 2019 coronavirus disease airway management strategy for a provincial critical care and ground transport program by MacDonald, Scott, Kovacs, George, Witter, Tobias, Leroux, Yves, Crocker, Steven, Richards, Lindsay

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Hydrophone calibration using ambient noise by Castillo Moore, Kristy, Crocker, Steven E.

“…Hydrophone calibration typically requires a good signal-to-noise (SNR) ratio in order to calculate the free-field voltage sensitivity (FFVS). However, the SNR…”
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Residency of reef fish during pile driving within a shallow pierside environment by Iafrate, Joseph, Watwood, Stephanie, Reyier, Eric, Gilchrest, Matthew, Crocker, Steven

“…The potential effects of pile-driving on fish populations have received significant attention with the prevalence of construction at in-shore areas throughout…”
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Broadband normal mode energy metrics in the presence of internal waves by Dossot, Georges, Crocker, Steven, Miller, James H., Potty, Gopu R., Badiey, Mohsen

“…During the Shallow Water 2006 experiment a J-15 acoustic source deployed from the Research Vessel Sharp transmitted broadband (100–500 Hz) chirp signals 15 km…”
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Seabed characterization using ambient noise and compact arrays on an autonomous underwater vehicle by Nielsen, Peter L., Siderius, Martin, Miller, Jim, Crocker, Steven, Giard, Jennifer

“…Estimating the seabed geoacoustic properties at various fidelity levels has been a research topic for several decades. The majority of the applied seabed…”
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Small boat localization using adaptive three-dimensional beamforming on a tetrahedral and vertical line array by Gebbie, John, Siderius, Martin, Nielsen, Peter, Miller, James H., Crocker, Steven, Giard, Jennifer

“…Passive acoustic detection and localization of small surface craft has a number of practical applications, such as monitoring and protecting sensitive marine…”
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Estimation of sea floor properties using acoustic vector sensors by Crocker, Steven E., Miller, James H., Osler, John C., Potty, Gopu R., Hines, Paul C.

“…Information in the acoustic vector field can be used to estimate properties of the environment with which the field interacts. A study was performed to…”
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On the use of acoustic particle motion in geoacoustic inversion by Crocker, Steven E., Miller, James H., Hines, Paul C., Osler, John C.

“…Geoacoustic inversion estimates sediment properties based on one or more parameters of an observed acoustic field via inverse mathematical methods. The…”
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