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Title: Sound radiation of rectangular plates containing tapered indentations of power-law profile
Authors: Bowyer, E.P.
Krylov, Victor V.
Issue Date: 2013
Publisher: © Acoustical Society of America (Published by the Acoustical Society of America through the American Institute of Physics)
Citation: BOWYER, E.P. and KRYLOV, V.V., 2013. Sound radiation of rectangular plates containing tapered indentations of power-law profile. of Meetings on Acoustics - 164th Meeting of the Acoustical Society of America, Kansas City, Missouri, 22-26 October 2012, 18, 030002, 13pp.
Abstract: In this paper, the results of the experimental investigations into the sound radiation of vibrating rectangular plates containing tapered indentations of power-law profile are reported. Such tapered indentations materialise two-dimensional acoustic black holes for flexural waves that result in absorption of a large proportion of the incident flexural wave energy and, therefore, cause efficient damping of plate’s flexural vibrations. A multi-indentation plate was compared to a plain reference plate of the same dimensions, and the radiated sound power was determined in accordance with ISO 3744. It was demonstrated that not only do such multiple indentations provide substantial reduction in damping of flexural vibrations within the plate, but also cause a substantial reduction in the radiated sound power. This paper also considers the effect of distribution of the plate’s vibrational response on the amplitudes of the radiated sound. It is shown that, despite an increase in the amplitudes of displacements at the indentations’ tips, the overall reduction in vibration level over the plate is large enough to result in substantial reduction in the radiated sound power.
Description: This article was published in the Proceedings of Meetings on Acoustics - 164th Meeting of the Acoustical Society of America [© Acoustical Society of America]. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America.
Version: Published
DOI: 10.1121/1.4776152
URI: https://dspace.lboro.ac.uk/2134/11514
Publisher Link: http://dx.doi.org/10.1121/1.4776152
Appears in Collections:Published Articles (Aeronautical and Automotive Engineering)

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