Sound Pressure Attenuation Provided By A
3D Rigid Acoustic Barrier On A Building Façade:
The Influence Of Its Longitudinal Shape
Author(s)
A. Tadeu, J. António & I. Castro
Abstract
This paper models the propagation of sound in the vicinity of 3D acoustic
barriers placed parallel to a building façade to mitigate the noise generated by
point pressure sources. The barriers are assumed to be very thin rigid elements.
The problem is solved by developing and implementing a 3D boundary element
method formulation based on the normal derivative integral equation (TBEM).
The TBEM is formulated in the frequency domain and the resulting
hypersingular terms are computed analytically.
After verifying the model against 2.5D BEM solutions, several numerical
applications are described to illustrate the practical usefulness of the proposed
approaches. Different longitudinal barrier geometries are simulated to evaluate
the influence of this characteristic on the sound pressure level attenuation
attained at the building façade.
Keywords: acoustic wave propagation, 3D thin barriers, normal derivative
integral equation, analytical integration of hypersingular integrals.
1 Introduction
Different numerical methods have been developed to solve acoustic problems in
either the time domain or the frequency domain. The works by Marburg and
Nolte [1], Cheng and Cheng [2] and Pluymers et al. [3] and the reference book
by Jensen et al. [4] give a good general overview of the developments in this
field.
Keywords
acoustic wave propagation, 3D thin barriers, normal derivative
integral equation, analytical integration of hypersingular integrals.
Related Book
Other papers in this volume
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