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Scan-based sound visualisation methods using sound pressure and particle velocity

Scan-based sound visualisation methods using sound pressure and particle velocity
Scan-based sound visualisation methods using sound pressure and particle velocity
Sound visualisation techniques have played a key role in the development of acoustics throughout history. Progress in measurement apparatus and the techniques used to display sound and vibration phenomena has provided excellent tools for understanding specific acoustic problems. Traditional methods, however, such as step-by-step measurements or simultaneous multichannel systems, require a significant trade-off between time requirements, flexibility, and cost.

This thesis explores the foundations of a novel sound field mapping procedure. The proposed technique, Scan and Paint, is based on the acquisition of sound pressure and particle velocity by manually moving a p-u probe (pressure-particle velocity sensor) across a sound field, whilst filming the event with a camera. The sensor position is extracted by applying automatic colour tracking to each frame of the recorded video. It is then possible to directly visualise sound variations across the space in terms of sound pressure, particle velocity or acoustic intensity.

The high flexibility, high resolution, and low cost characteristics of the proposed measurement methodology, along with its short time requirements, define Scan and Paint as an efficient sound visualisation technique for stationary sound fields. A wide range of specialised applications have been studied, proving that the measurement technique is not only suitable for near-field source localisation purposes but also for vibro-acoustic problems, panel noise contribution analysis, source radiation assessment, intensity vector field mapping and far field localisation.
sound visualisation, sound mapping, sound radiation, scanning methods, p-u intensity probes, panel contribution analysis, sound source ranking, operational deflections shapes, virtual phased arrays
Fernandez Comesana, Daniel
156c0f0a-b641-4b56-8790-ff3d4dcb96fd
Fernandez Comesana, Daniel
156c0f0a-b641-4b56-8790-ff3d4dcb96fd
Holland, Keith
90dd842b-e3c8-45bb-865e-3e7da77ec703

Fernandez Comesana, Daniel (2014) Scan-based sound visualisation methods using sound pressure and particle velocity. University of Southampton, Institute of Sound and Vibration Research, Doctoral Thesis, 204pp.

Record type: Thesis (Doctoral)

Abstract

Sound visualisation techniques have played a key role in the development of acoustics throughout history. Progress in measurement apparatus and the techniques used to display sound and vibration phenomena has provided excellent tools for understanding specific acoustic problems. Traditional methods, however, such as step-by-step measurements or simultaneous multichannel systems, require a significant trade-off between time requirements, flexibility, and cost.

This thesis explores the foundations of a novel sound field mapping procedure. The proposed technique, Scan and Paint, is based on the acquisition of sound pressure and particle velocity by manually moving a p-u probe (pressure-particle velocity sensor) across a sound field, whilst filming the event with a camera. The sensor position is extracted by applying automatic colour tracking to each frame of the recorded video. It is then possible to directly visualise sound variations across the space in terms of sound pressure, particle velocity or acoustic intensity.

The high flexibility, high resolution, and low cost characteristics of the proposed measurement methodology, along with its short time requirements, define Scan and Paint as an efficient sound visualisation technique for stationary sound fields. A wide range of specialised applications have been studied, proving that the measurement technique is not only suitable for near-field source localisation purposes but also for vibro-acoustic problems, panel noise contribution analysis, source radiation assessment, intensity vector field mapping and far field localisation.

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More information

Published date: 25 July 2014
Keywords: sound visualisation, sound mapping, sound radiation, scanning methods, p-u intensity probes, panel contribution analysis, sound source ranking, operational deflections shapes, virtual phased arrays
Organisations: University of Southampton, Acoustics Group

Identifiers

Local EPrints ID: 366935
URI: http://eprints.soton.ac.uk/id/eprint/366935
PURE UUID: 546c5e53-7adb-4e77-ae6a-b0108d555047
ORCID for Keith Holland: ORCID iD orcid.org/0000-0001-7439-2375

Catalogue record

Date deposited: 21 Oct 2014 12:21
Last modified: 06 Jun 2018 13:12

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Contributors

Author: Daniel Fernandez Comesana
Thesis advisor: Keith Holland ORCID iD

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