Sounds were recorded simutaneoulsy at two depths, 3 and 9.1 m from the surface. Sound sources included sediment removal, pump-out of material, pump-out of clear water during pipe flushing, and transit to the borrow site (hopper empty) and to the pump -out stations fully loaded. Received and 1/3-octave Sound Pressure Levels (dB re 1 µPa,
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Characterization of Underwater Sounds Produced by a Hydraulic Cutterhead Dredge during Maintenance Dredging in the Stockton Deepwater Shipping Channel, California 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S) 5d. PROJECT NUMBER 5e. TASK NUMBER 5f. WORK UNIT NUMBER 7. PERFORMING ORGANIZATION …
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Feb 18, 2019 · CMST-GA MB Process Multibeam sonar processing software. Software for processing selected Reson and Kongsberg multibeam echo-sounder files. Developed by Alexander Gavrilov (CMST), Justy Siwabessy (Geoscience Australia/CMST), Iain Parnum (CMST) and Alec Duncan (CMST), MB Process can be used to process Reson (.xtf) and Kongsberg (.all) …
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Jan 01, 2019 · Characterization of underwater sounds produced by a backhoe dredge excavating rock and gravel Army Corps of Engineers Vicksburg MS Research and Development Center ( 2012 )
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Underwater sounds were characterized for three trailing suction hopper dredges TSHD during the removal of 3.1 million yd3 of sand from an offshore borrow area and during offloading of the escavated sediment at the pump-out stations in support of the Wallops Island, Virginia Beach Stabilization Project. Sounds were recorded simutaneoulsy at two depths, 3 and 9.1 m from the …
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An experiment by the Naval Postgraduate School and the National Data Buoy Center was performed in the Gulf of Mexico to investigate the underwater sound generated by heavy precipitation under a variety of conditions. During the first stage of the experiment, nine data sets were obtained with rainfall rates up to 300 mm/hr. The characteristic fifteen kilohertz peak in …
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Characterization of underwater sounds produced by a hydraulic cutter head dredge fracturing limestone rock. DOER Technical Notes Collection ERDC TN-DOER-E34, U.S. Army Engineer Research and Development Centre, Vicksburg, Mississippi, USA: WODA, 2013. Techincal guidance on: Underwater sound in realtion to dredging. Anthropogenic: Dredging
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Characterization of Underwater Sounds Produced by a Backhoe Dredge Excavating Rock and Gravel by Kevin Reine, Douglas Clarke, and Charles Dickerson PURPOSE: This …
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Aug 01, 2001 · Both continuous sounds, such those produced by propellers, pumps, and generators, and repetitive sounds produced by particular dredging events (e.g., dredge bucket striking the channel bottom, jaws of bucket clamping shut) are potential sources of underwater noise. This note examines the intensity, periodicity, and attenuation of emitted sounds from …
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Propagation of Sound • Sound energy introduced in the part propagates (travels) through the material in the form of waves • A discontinuity, such as a crack, will reflect some of the sound wave back to the transducer • Size of reflected signal depends on both the size of the discontinuity and its distance from the sound source
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Jan 01, 2019 · Characterization of underwater sounds produced by a backhoe dredge excavating rock and gravel Army Corps of Engineers Vicksburg MS Research and Development Center ( 2012 )
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Aug 01, 2001 · This technical note presents a characterization of underwater sounds produced by bucket dredging operations in Cook Inlet, Alaska. Both continuous sounds, such those produced by propellers, pumps, and generators, and repetitive sounds produced by particular dredging events (e.g., dredge bucket striking the channel bottom, jaws of bucket clamping …
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With regard to the characterization of dredging sounds, progress is being made and a lot more is known now than some years ago. Dredging sounds can be associ- Dickerson C (2012a) Characterization of underwater sounds produced by a backhoe dredge excavating rock and gravel. DOER technical notes collection ERDC TN-DOER-E36, US Army Engineer
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PURPOSE: This technical note presents a characterization of underwater sounds produced by bucket dredging operations in Cook Inlet, Alaska. Both continuous sounds, such as those produced by propellers, pumps, and generators, and repetitive sounds produced by particular dredging events (e.g., dredge bucket striking the channel bottom, jaws of
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Characterization of Underwater Sounds Produced by a Backhoe Dredge Excavating Rock and Gravel. Abstract : This technical note characterizes underwater sound produced by a backhoe dredge during rock removal as part of the widening and deepening of New York/New Jersey Harbor. Both continuous … Expand. 6. PDF. Save.
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CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): PURPOSE: This technical note presents a characterization of underwater sounds produced by bucket dredging operations in Cook Inlet, Alaska. Both continuous sounds, such as those produced by propellers, pumps, and generators, and repetitive sounds produced by particular dredging events (e.g., …
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In order to adequately assess the risks associated with backhoe dredging operations, sounds were characterized with respect to sound pressure levels (SPLs) generated by this dredge type across the broad 20-Hz to 20-kHz spectrum.
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