Spatial resolution limits for the localization of noise sources using direct sound mapping
Spatial resolution limits for the localization of noise sources using direct sound mapping
One of the main challenges arising from noise and vibration problems is how to identify the areas of a device, machine or structure that produce significant acoustic excitation, i.e. the localization of main noise sources. The direct visualization of sound, in particular sound intensity, has extensively been used for many years to locate sound sources. However, it is not yet well defined when two sources should be regarded as resolved by means of direct sound mapping. This paper derives the limits of the direct representation of sound pressure, particle velocity and sound intensity by exploring the relationship between spatial resolution, noise level and geometry. The proposed expressions are validated in simulations and experiments. It is shown that particle velocity mapping yields better results for identifying closely spaced sound sources than sound pressure or sound intensity, especially in the acoustic near-field.
53-62
Fernandez Comesana, D.
acfbbf8b-2383-4259-8d04-7d2965b0e922
Holland, K.
90dd842b-e3c8-45bb-865e-3e7da77ec703
Fernandez-Grande, E.
bdffb45b-33b5-4ff0-a862-2392de63eb36
4 August 2016
Fernandez Comesana, D.
acfbbf8b-2383-4259-8d04-7d2965b0e922
Holland, K.
90dd842b-e3c8-45bb-865e-3e7da77ec703
Fernandez-Grande, E.
bdffb45b-33b5-4ff0-a862-2392de63eb36
Fernandez Comesana, D., Holland, K. and Fernandez-Grande, E.
(2016)
Spatial resolution limits for the localization of noise sources using direct sound mapping.
Journal of Sound and Vibration, 375, .
(doi:10.1016/j.jsv.2016.04.010).
Abstract
One of the main challenges arising from noise and vibration problems is how to identify the areas of a device, machine or structure that produce significant acoustic excitation, i.e. the localization of main noise sources. The direct visualization of sound, in particular sound intensity, has extensively been used for many years to locate sound sources. However, it is not yet well defined when two sources should be regarded as resolved by means of direct sound mapping. This paper derives the limits of the direct representation of sound pressure, particle velocity and sound intensity by exploring the relationship between spatial resolution, noise level and geometry. The proposed expressions are validated in simulations and experiments. It is shown that particle velocity mapping yields better results for identifying closely spaced sound sources than sound pressure or sound intensity, especially in the acoustic near-field.
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More information
Accepted/In Press date: 11 April 2016
e-pub ahead of print date: 23 April 2016
Published date: 4 August 2016
Organisations:
Acoustics Group
Identifiers
Local EPrints ID: 396869
URI: http://eprints.soton.ac.uk/id/eprint/396869
ISSN: 0022-460X
PURE UUID: c7772074-e10d-42f8-bbb2-6ae3e1fd6eb4
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Date deposited: 15 Jun 2016 10:31
Last modified: 15 Mar 2024 05:40
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Author:
D. Fernandez Comesana
Author:
K. Holland
Author:
E. Fernandez-Grande
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