The University of Southampton
University of Southampton Institutional Repository

The horizontal directivity of noise radiated by a rail and implications for use of microphone arrays

Record type: Article

Structural waves propagating along a railway rail form an extended source of sound radiation. Using an equivalent source model the distribution of this sound in a horizontal plane is investigated and shown to consist mainly of sound propagation at a particular angle to the normal. This direction is determined by the ratio of the wavenumbers in the rail and in air. Due to the extended nature of the rail as a source, the spatial distribution of the sound field in the direction along the track does not lend itself to the use of a simple directivity factor. The consequences for the measurement of noise from the rail using a microphone array are then explored. It is shown that a microphone array focussed normal to the rail does not detect most of the sound radiated by the rail. By turning the focus angle, the sound detected becomes a maximum when this angle corresponds to the angle of propagation of the sound radiation. Measurements on a test track using artificial excitation and measurements during the passage of a train confirm these conclusions

Full text not available from this repository.

Citation

Kitagawa, Toshiki and Thompson, David J. (2010) The horizontal directivity of noise radiated by a rail and implications for use of microphone arrays Journal of Sound and Vibration, 329, (2), pp. 202-220. (doi:10.1016/j.jsv.2009.09.002).

More information

Published date: 18 January 2010
Organisations: Dynamics Group

Identifiers

Local EPrints ID: 148995
URI: http://eprints.soton.ac.uk/id/eprint/148995
ISSN: 0022-460X
PURE UUID: 34949b3c-8623-4d7f-9e86-7893221f16ce
ORCID for David J. Thompson: ORCID iD orcid.org/0000-0002-7964-5906

Catalogue record

Date deposited: 29 Apr 2010 13:07
Last modified: 18 Jul 2017 19:31

Export record

Altmetrics

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 http://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.

×