Author(s)

J. António, L. Godinho & A. Tadeu

Abstract

Comparison of acoustic insulation provided by infinite plane versus circular closed walls J. Antonio, L. Godinho & A. Tadeu Department of Civil Engineering, University of Coimbra, Portugal. Abstract In this paper, analytical solutions are used to compute the acoustic insulation provided by plane and circular closed walls when subjected to sinusoidal harmonic line pressure loads. In the first case the panel is assumed to have infinite extent and the pressure wave field is computed using 2.5D Green's functions established in Cartesian co-ordinates for an infinite solid layer bounded by fluid media. The threedimensional problem is formulated as a summation of two-dimensional problems for different wave numbers along the z direction. Each two-dimensional problem in turn is written as a superposition of plane waves for varying wave numbers along the x direction. The curved wall is modelled as a cylindrical solid annulus bounded by fluid media, and the pressure wave field is computed using analytic

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