Approximate formulae for the average one sided specific radiation wave impedance of a finite rectangular panel

Davy, J, Larner, D, Wareing, R and Pearse, J 2014, 'Approximate formulae for the average one sided specific radiation wave impedance of a finite rectangular panel', in Norm Broner, Charles Don (ed.) Proceedings of the 43rd International Congress on Noise Control Engineering: Internoise 2014, Melbourne, Australia, 16-19 November 2014, pp. 1-10.


Document type: Conference Paper
Collection: Conference Papers

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Title Approximate formulae for the average one sided specific radiation wave impedance of a finite rectangular panel
Author(s) Davy, J
Larner, D
Wareing, R
Pearse, J
Year 2014
Conference name Inter.Noise 2014
Conference location Melbourne, Australia
Conference dates 16-19 November 2014
Proceedings title Proceedings of the 43rd International Congress on Noise Control Engineering: Internoise 2014
Editor(s) Norm Broner, Charles Don
Publisher Australian Acoustical Society
Place of publication Australia
Start page 1
End page 10
Total pages 10
Abstract The authors have previously published approximate formulae for the average one sided specific radiation wave impedance of a finite rectangular panel mounted in a rigid infinite baffle. The panel's transverse vibration was due to a (possibly forced) two dimensional bending plane wave propagating in the panel without reflection at the edges of the panel. The average was over all the surface area of the panel and over all possible azimuthal angles of propagation direction. The radiation from waves propagating in different directions was assumed to be uncorrelated. These approximate formulae were derived from the 1982 research of Thomasson whose approximate formulae only covered the high and low frequency regions and not the mid frequency region. This paper presents more accurate versions of some of the approximate formulae. When the bending wave number is larger than the wave number of sound, the real part of the impedance is smaller than that for the case studied by Maidanik and Leppington. This is because correlated reflections are not included the case analyzed in this paper. When the bending wave number is smaller than or equals the wave number of sound, the real part of the impedance is the same for both cases.
Subjects Acoustics and Acoustical Devices; Waves
Acoustics and Noise Control (excl. Architectural Acoustics)
Architectural Science and Technology (incl. Acoustics, Lighting, Structure and Ecologically Sustainable Design)
Keyword(s) Radiation
Impedance
Rectangle I-INCE Classification of Subjects Number(s): 23.1
Copyright notice © 2014 Australian Acoustical Society; Author(s)
ISBN 9780909882044
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