Geoacoustic inversion of ship radiated noise in shallow water using data from a single hydrophone

Crocker, Steven E.; Nielsen, Peter L.; Miller, James H.; Siderius, Martin

doi:10.1121/1.4898739

Cited by 22 publications

(8 citation statements)

References 5 publications

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“…Passive acoustic methods have been previously used to examine, characterize and quantify the sound radiated from surface ships, with most measurements in the published literature made using a single hydrophone [36,37] or a small number of widely-separated hydrophones [3,4,38] located from within a few hundred meters to a few kilometers away from a ship. Ship-radiated sound has also been measured using a 128-element vertical hydrophone array [39] and bottom-mounted hydrophones [40].…”

Section: Introductionmentioning

confidence: 99%

Continental Shelf-Scale Passive Acoustic Detection and Characterization of Diesel-Electric Ships Using a Coherent Hydrophone Array

et al. 2017

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The passive ocean acoustic waveguide remote sensing (POAWRS) technique is employed to detect and characterize the underwater sound radiated from three scientific research and fishing vessels received at long ranges on a large-aperture densely-sampled horizontal coherent hydrophone array. The sounds radiated from the research vessel (RV) Delaware II in the Gulf of Maine, and the RV Johan Hjort and the fishing vessel (FV) Artus in the Norwegian Sea are found to be dominated by distinct narrowband tonals and cyclostationary signals in the 150 Hz to 2000 Hz frequency range. The source levels of these signals are estimated by correcting the received pressure levels for transmission losses modeled using a calibrated parabolic equation-based acoustic propagation model for random range-dependent ocean waveguides. The probability of the detection region for the most prominent signal radiated by each ship is estimated and shown to extend over areas spanning roughly 200 km in diameter when employing a coherent hydrophone array. The current standard procedure for quantifying ship-radiated sound source levels via one-third octave bandwidth intensity averaging smoothes over the prominent tonals radiated by a ship that can stand 10 to 30 dB above the local broadband level, which may lead to inaccurate or incorrect assessments of the impact of ship-radiated sound.

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Section: Introductionmentioning

confidence: 99%

Continental Shelf-Scale Passive Acoustic Detection and Characterization of Diesel-Electric Ships Using a Coherent Hydrophone Array

et al. 2017

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“…Passive acoustic methods have been previously used to examine, characterize and quantify the sound radiated from ocean vessels. The majority of measurements in published literature is obtained using a single hydrophone [25,26] or a small number of widely-separated hydrophones [27][28][29] located within a few hundred meters to a few kilometers from a ship. Ship-radiated sound has also been measured using a 128-element vertical hydrophone array [30] and bottom-mounted hydrophones [31].…”

Section: Introductionmentioning

confidence: 99%

Detection, Localization and Classification of Multiple Mechanized Ocean Vessels over Continental-Shelf Scale Regions with Passive Ocean Acoustic Waveguide Remote Sensing

et al. 2018

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Multiple mechanized ocean vessels, including both surface ships and submerged vehicles, can be simultaneously monitored over instantaneous continental-shelf scale regions >10,000 km 2 via passive ocean acoustic waveguide remote sensing. A large-aperture densely-sampled coherent hydrophone array system is employed in the Norwegian Sea in Spring 2014 to provide directional sensing in 360 degree horizontal azimuth and to significantly enhance the signal-to-noise ratio (SNR) of ship-radiated underwater sound, which improves ship detection ranges by roughly two orders of magnitude over that of a single hydrophone. Here, 30 mechanized ocean vessels spanning ranges from nearby to over 150 km from the coherent hydrophone array, are detected, localized and classified. The vessels are comprised of 20 identified commercial ships and 10 unidentified vehicles present in 8 h/day of Passive Ocean Acoustic Waveguide Remote Sensing (POAWRS) observation for two days. The underwater sounds from each of these ocean vessels received by the coherent hydrophone array are dominated by narrowband signals that are either constant frequency tonals or have frequencies that waver or oscillate slightly in time. The estimated bearing-time trajectory of a sequence of detections obtained from coherent beamforming are employed to determine the horizontal location of each vessel using the Moving Array Triangulation (MAT) technique. For commercial ships present in the region, the estimated horizontal positions obtained from passive acoustic sensing are verified by Global Positioning System (GPS) measurements of the ship locations found in a historical Automatic Identification System (AIS) database. We provide time-frequency characterizations of the underwater sounds radiated from the commercial ships and the unidentified vessels. The time-frequency features along with the bearing-time trajectory of the detected signals are applied to simultaneously track and distinguish these vessels.

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“…The mechanical noise, generated from the mechanical vibration of working units in ship, is the main component of ship radiated noise in the condition of low ship speed. Meanwhile, the propeller noise, generated from the blade resonance when the propeller blade flaps and cuts the water flow, belongs to a type of mixed noise radiated by propeller, and its main component is "singing" [2]. Moreover, the propeller noise is the main component of ship radiated noise in low-frequency band 1-100 Hz.…”

Section: Introductionmentioning

confidence: 99%

Radiated Noise Measurement of Ships Based on Stochastic Resonance

Peng¹,

Sun²,

Cheng³

2015

TOMEJ

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The radiated noise of ships involves strong low-frequency line spectrum, which is greatly related with the working states of auxiliary equipment and the rotation of propeller, and then regarded as the important basis in feature extraction of ships. Moreover, the stochastic resonance has special advantages in the extraction of weak signal. Aiming at the multi-frequency components in radiated noise of the ship with four-blade propeller, and the characteristic without adiabatic approximation assumption, a sweep-frequency stochastic resonance detection system is established in this paper. Meanwhile, a kind of detection method on multi-frequency signal with partitioning large parameters is proposed, in order to identify the components of low-frequency line spectrum in radiated noise of ship. The analysis and simulation results present that, under the strong noise background, the proposed method can still effectively detect the low-frequency line spectrum, which lays the solid foundation for the subsequent target recognition and speed estimation of the ship.

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Geoacoustic inversion of ship radiated noise in shallow water using data from a single hydrophone

Cited by 22 publications

References 5 publications

Continental Shelf-Scale Passive Acoustic Detection and Characterization of Diesel-Electric Ships Using a Coherent Hydrophone Array

Continental Shelf-Scale Passive Acoustic Detection and Characterization of Diesel-Electric Ships Using a Coherent Hydrophone Array

Detection, Localization and Classification of Multiple Mechanized Ocean Vessels over Continental-Shelf Scale Regions with Passive Ocean Acoustic Waveguide Remote Sensing

Radiated Noise Measurement of Ships Based on Stochastic Resonance

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