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Measurement of radiated ship noise

Measurement of radiated ship noise
Measurement of radiated ship noise
A methodology is presented for measuring the radiated noise from a ship in shallow water, and deriving the source level spectrum. The method is applied to the measurement of dredgers in UK waters, vessels which are restricted to shallow water during aggregate extraction. Estimation of source level requires an estimate of the transmission loss which accounts for the effect of both the surface and seabed. The measurement method used involves the simultaneous measurement of the radiated noise at a number of measurement stations, each consisting of hydrophones which are either deployed from a stationary survey vessel, or from an autonomous recording buoy. The measurements at up to four ranges from the source vessel allow for empirical estimation of the source level using appropriate transmission loss models, with the data analysed in third-octave frequency bands. Measurement results presented are for trailing suction hopper dredgers, which lower a drag head and suction pipe to the sea floor to extract the sand or gravel, whilst returning unwanted material and water over the side.. Noise levels are shown for the same dredger under different operational modes illustrating that, for these vessels, the noise output level is partially dependent upon the aggregate type being extracted.
1939-800X
070091-[10pp]
Wang, Lian S.
075df50c-a4a2-4a09-967c-f4b242df0c5f
Robinson, Stephen P.
ff096bc4-4e1f-44ec-ae1d-d671208d1ae7
Theobald, Pete
13776fba-3681-4fcb-a5ef-90437a892ff2
Lepper, Paul A.
bb869662-0dba-4120-8314-2838e992c230
Hayman, Gary
e6dee9c3-cf2d-4c89-bb39-4a91612c6011
Humphrey, Victor F.
23c9bd0c-7870-428f-b0dd-5ff158d22590
Wang, Lian S.
075df50c-a4a2-4a09-967c-f4b242df0c5f
Robinson, Stephen P.
ff096bc4-4e1f-44ec-ae1d-d671208d1ae7
Theobald, Pete
13776fba-3681-4fcb-a5ef-90437a892ff2
Lepper, Paul A.
bb869662-0dba-4120-8314-2838e992c230
Hayman, Gary
e6dee9c3-cf2d-4c89-bb39-4a91612c6011
Humphrey, Victor F.
23c9bd0c-7870-428f-b0dd-5ff158d22590

Wang, Lian S., Robinson, Stephen P., Theobald, Pete, Lepper, Paul A., Hayman, Gary and Humphrey, Victor F. (2013) Measurement of radiated ship noise. Proceedings of Meetings on Acoustics, 17, 070091-[10pp]. (doi:10.1121/1.4792663).

Record type: Article

Abstract

A methodology is presented for measuring the radiated noise from a ship in shallow water, and deriving the source level spectrum. The method is applied to the measurement of dredgers in UK waters, vessels which are restricted to shallow water during aggregate extraction. Estimation of source level requires an estimate of the transmission loss which accounts for the effect of both the surface and seabed. The measurement method used involves the simultaneous measurement of the radiated noise at a number of measurement stations, each consisting of hydrophones which are either deployed from a stationary survey vessel, or from an autonomous recording buoy. The measurements at up to four ranges from the source vessel allow for empirical estimation of the source level using appropriate transmission loss models, with the data analysed in third-octave frequency bands. Measurement results presented are for trailing suction hopper dredgers, which lower a drag head and suction pipe to the sea floor to extract the sand or gravel, whilst returning unwanted material and water over the side.. Noise levels are shown for the same dredger under different operational modes illustrating that, for these vessels, the noise output level is partially dependent upon the aggregate type being extracted.

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More information

Accepted/In Press date: 5 February 2013
e-pub ahead of print date: 5 February 2013
Organisations: Acoustics Group

Identifiers

Local EPrints ID: 375771
URI: http://eprints.soton.ac.uk/id/eprint/375771
ISSN: 1939-800X
PURE UUID: 5473b943-b2e0-47a6-9fa1-ea12518e08a9
ORCID for Victor F. Humphrey: ORCID iD orcid.org/0000-0002-3580-5373

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Date deposited: 14 Apr 2015 09:00
Last modified: 15 Mar 2024 03:17

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Contributors

Author: Lian S. Wang
Author: Stephen P. Robinson
Author: Pete Theobald
Author: Paul A. Lepper
Author: Gary Hayman

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