Analytical Solutions For The Acoustic Insulation Provided By Multi-layer Systems
Author(s)
L. Godinho, A. Tadeu & J. António
Abstract
Analytical solutions for the acoustic insulation
provided by multi-layer systems
L. Godinho, A. Tadeu & J. Antonio
Department of Civil Engineering
University of Coimbra, Portugal
Abstract
Elastic panels made of more than one layer are frequently used as a practical
solution to increase the acoustic insulation of walls and ceilings. In most cases,
the propagation of sound waves across these systems is analyzed using simplified
approaches that disregard some of the wave propagation phenomena involved.
This work describes an analytical model that enables such multi-layered systems
to be studied. The model allows panels to be simulated with differing numbers of
layers and bounded by two fluid media. The solutions are computed for
sinusoidal line loads acting in the fluid on either side of the panels, and are
expressed as a summation of the effects of plane waves with different
inclinations, taking into account the adequate boundary conditions. This
procedure allows the presence of the multiple lay
Keywords
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