Numerical analysis of the influence of acoustic resonance in air cavities between windowpanes on sound transmission loss

Authors:  Takafumi Shimizu, Masahiro Toyoda, Daiji Takahashi, Yasuhito Kawai

Abstract:
The phenomenon of mass-air-ma ss resonance between multiple panes of a window degrades the noise insulation performa nce. In this study, a prediction method for the effect of this resonance is proposed by using the boundary integral equation method (BIEM) and its countermeasure by a sound-abs orbing treatment for the perimeter of the air cavity on the insulation performance are also discussed. Additionally, the purpose of this paper is to explain the detail of the analysis for prediction of sound transmission of double-pane windows, and to expand this method to triple-pane windows. For simplicity in the analysis and to make clear both the phenomenon of mass-air-ma ss resonance and the effect of its countermeasure , each pane is modeled as a limp panel that depends only on the mass law, therefore neither the modal effect nor coinciden ce effect due to elasticity of each pane is considered. In this study, the effect of pane size on sound transmission is evaluated by using the same limp-panel model of infinite extent, which has the essence of mass-air- mass resonance and may express the effect of the phenomenon noticeab ly.

Keywords:
Multiple pane windows
Acoustic resonance
Sound transmission loss
BIEM

Published in: Applied Acoustics (Volume 74, Issue 8, August  2013)

Publisher: Elsevier

ISSN Information: 0003-682X

Numerical analysis of the influence of acoustic resonance in air cavities between windowpanes on sound transmission loss

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