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Variability of low frequency sound transmission measurements

Variability of low frequency sound transmission measurements
Variability of low frequency sound transmission measurements
In this paper we discuss the characterization of low frequency sound transmission between two rooms via a flexible panel. A fully-coupled modal model is used to investigate the individual effect of the source room and the receiving room on the measured sound reduction index, and the results are compared with the ideal case of having a free field on both sides of the panel. The effect of the source room on the measured sound reduction index at low frequencies can be reduced by using a number of suitable-driven loudspeakers close to the panel to simulate a diffuse incident field. However, the effect of the receiving room was found not to be reduced by calculating the transmitted acoustic power from a dense array of acoustic intensity measurements, instead of an array of microphones in the receiving room.
0001-4966
2986-2997
Bravo, Teresa
537c3484-ac56-4b89-a2ca-f835a86bc9b1
Elliott, Stephen J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
Bravo, Teresa
537c3484-ac56-4b89-a2ca-f835a86bc9b1
Elliott, Stephen J.
721dc55c-8c3e-4895-b9c4-82f62abd3567

Bravo, Teresa and Elliott, Stephen J. (2004) Variability of low frequency sound transmission measurements. Journal of the Acoustical Society of America, 115 (6), 2986-2997. (doi:10.1121/1.1738452).

Record type: Article

Abstract

In this paper we discuss the characterization of low frequency sound transmission between two rooms via a flexible panel. A fully-coupled modal model is used to investigate the individual effect of the source room and the receiving room on the measured sound reduction index, and the results are compared with the ideal case of having a free field on both sides of the panel. The effect of the source room on the measured sound reduction index at low frequencies can be reduced by using a number of suitable-driven loudspeakers close to the panel to simulate a diffuse incident field. However, the effect of the receiving room was found not to be reduced by calculating the transmitted acoustic power from a dense array of acoustic intensity measurements, instead of an array of microphones in the receiving room.

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Published date: June 2004

Identifiers

Local EPrints ID: 11018
URI: https://eprints.soton.ac.uk/id/eprint/11018
ISSN: 0001-4966
PURE UUID: fe24da93-216a-416e-89cc-87b29fb73a02

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Date deposited: 14 Mar 2005
Last modified: 17 Jul 2017 17:05

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