The University of Southampton
University of Southampton Institutional Repository

The use of a sparse planar array sensor for measurement of the acoustic properties of panel materials at simulated ocean conditions

The use of a sparse planar array sensor for measurement of the acoustic properties of panel materials at simulated ocean conditions
The use of a sparse planar array sensor for measurement of the acoustic properties of panel materials at simulated ocean conditions
Characterisation of the acoustic properties of materials for underwater acoustics is often carried out by measuring the transmitted and/or reflected pressure signals after insonification of a test panel by an incident acoustic wave. For this method to be reliable, the incident and transmitted (or reflected) signals arriving at the hydrophone receiver should be well separated in time (enabling windowing techniques to be applied), and the diffracted signals from the panel edge should not contaminate the measured signal. At low kilohertz frequencies, these conditions are difficult to achieve for the size of panel and test tank commonly available. This paper describes a method for discriminating against the diffracted signals by use of a planar array of hydrophones as the receiver. The sound source used for the method is a parametric array to provide some source directivity and to provide short broadband signals for analysis. The method is demonstrated by application to the measurement of reflection loss and transmission loss for test panels at frequencies of 1 kHz to 10 kHz under simulated ocean conditions using a specialised test chamber capable of controlling the water temperature and hydrostatic pressure during measurements. A comparison is shown with results obtained with a single hydrophone, and a discussion is given of the number and position of hydrophones in the array.
235-242
Beamiss, Graham A.
785a1c0a-d7b3-4760-b47f-8b0b8021b4f8
Robinson, Stephen P.
ff096bc4-4e1f-44ec-ae1d-d671208d1ae7
Wang, Lian S.
075df50c-a4a2-4a09-967c-f4b242df0c5f
Hayman, Gary
e6dee9c3-cf2d-4c89-bb39-4a91612c6011
Humphrey, Victor F.
23c9bd0c-7870-428f-b0dd-5ff158d22590
Smith, John D.
4e16fbba-34c7-4d94-b801-43a24981283a
Martin, M. J.
d749b7b3-5c01-470d-bf79-4fd26b1f9379
Beamiss, Graham A.
785a1c0a-d7b3-4760-b47f-8b0b8021b4f8
Robinson, Stephen P.
ff096bc4-4e1f-44ec-ae1d-d671208d1ae7
Wang, Lian S.
075df50c-a4a2-4a09-967c-f4b242df0c5f
Hayman, Gary
e6dee9c3-cf2d-4c89-bb39-4a91612c6011
Humphrey, Victor F.
23c9bd0c-7870-428f-b0dd-5ff158d22590
Smith, John D.
4e16fbba-34c7-4d94-b801-43a24981283a
Martin, M. J.
d749b7b3-5c01-470d-bf79-4fd26b1f9379

Beamiss, Graham A., Robinson, Stephen P., Wang, Lian S., Hayman, Gary, Humphrey, Victor F., Smith, John D. and Martin, M. J. (2015) The use of a sparse planar array sensor for measurement of the acoustic properties of panel materials at simulated ocean conditions. UACE2015 - 3rd Underwater Acoustics Conference and Exhibition, Greece. 21 - 26 Jun 2015. pp. 235-242 .

Record type: Conference or Workshop Item (Paper)

Abstract

Characterisation of the acoustic properties of materials for underwater acoustics is often carried out by measuring the transmitted and/or reflected pressure signals after insonification of a test panel by an incident acoustic wave. For this method to be reliable, the incident and transmitted (or reflected) signals arriving at the hydrophone receiver should be well separated in time (enabling windowing techniques to be applied), and the diffracted signals from the panel edge should not contaminate the measured signal. At low kilohertz frequencies, these conditions are difficult to achieve for the size of panel and test tank commonly available. This paper describes a method for discriminating against the diffracted signals by use of a planar array of hydrophones as the receiver. The sound source used for the method is a parametric array to provide some source directivity and to provide short broadband signals for analysis. The method is demonstrated by application to the measurement of reflection loss and transmission loss for test panels at frequencies of 1 kHz to 10 kHz under simulated ocean conditions using a specialised test chamber capable of controlling the water temperature and hydrostatic pressure during measurements. A comparison is shown with results obtained with a single hydrophone, and a discussion is given of the number and position of hydrophones in the array.

PDF
__soton.ac.uk_ude_PersonalFiles_Users_vfh_mydocuments_Victor_papers_pdf_Beamiss et al from UACE2015_Proceedings-5.pdf - Other
Download (1MB)

More information

Published date: July 2015
Venue - Dates: UACE2015 - 3rd Underwater Acoustics Conference and Exhibition, Greece, 2015-06-21 - 2015-06-26
Organisations: Acoustics Group

Identifiers

Local EPrints ID: 379837
URI: https://eprints.soton.ac.uk/id/eprint/379837
PURE UUID: 3e08dc66-ddc3-4064-8a7b-515456fb40ba
ORCID for Victor F. Humphrey: ORCID iD orcid.org/0000-0002-3580-5373

Catalogue record

Date deposited: 25 Aug 2015 12:26
Last modified: 06 Jun 2018 12:45

Export record

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×