Empirical prediction of traffic noise transmission loss across plenum windows

Li, Xiaolong and Tong, Y.G. and Tang, S.K. and Lau, K.K. (2019) Empirical prediction of traffic noise transmission loss across plenum windows. Applied Acoustics, 151. pp. 45-54. ISSN 0003-682X

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Abstract

A parametric study on the traffic noise transmission loss across plenum windows was carried out experimentally in this investigation in an attempt to establish a simple empirical model for predicting this transmission loss. A total of fourteen full scale plenum windows were included in this study. The results of a site mockup measurement were used for model validation. The present model was developed based on the existing plenum chamber theory in which the sound fields inside the plenum window cavities were assumed to make up of a diffracted wave and a reverberant field. Results suggest that both the diffracted and reverberant field inside the plenum window cavities are weaker than those assumed in existing plenum chamber theory. It is found that a model, which assumes frequency-independent diffraction directivity and percentage reverberant field attenuation, gives the best prediction of traffic noise transmission loss. This prediction model is also able to predict site test results with good accuracy

Item Type:	Article
Uncontrolled Keywords:	Plenum window; Sound insulation; Traffic noise; Prediction modelling
Subjects:	T Technology > TD Environmental technology. Sanitary engineering > TD878-894 Special types of environment, Including soil pollution, air pollution, noise pollution T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK3001-3521 Distribution or transmission of electric power
Divisions:	Faculty of Civil Engineering and Built Environment > Department of Architecture
Depositing User:	Miss Afiqah Faiqah Mohd Hafiz
Date Deposited:	24 Nov 2021 02:21
Last Modified:	24 Nov 2021 02:21
URI:	http://eprints.uthm.edu.my/id/eprint/4066

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