Two numerical models are presented for the prediction of sound leakage through openings in thin hard barriers. The first numerical method is based on a simple procedure of numerical integration that can be implemented straightforwardly. This model is a more general approach, suitable for barriers with arbitrary gaps. The second model is a new method that permits prediction of sound leakage due to the presence of horizontal gaps in a long barrier. In the new method, effective barriers of appropriate heights represent the edges of the horizontal gaps. The sound diffracted by each effective barrier is calculated by a closed-form analytic expression. The total sound-pressure level is determined from a sum of these diffracted fields. Hence, the new method is fast, simple, and intuitive, allowing the leakage to be assessed accurately. The validity of these two numerical models is confirmed by precise experimental measurements.
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March 2001
March 01 2001
Prediction models for sound leakage through noise barriers
Hon Yiu Wong;
Hon Yiu Wong
Department of Mechanical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong
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Kai Ming Li
Kai Ming Li
Department of Mechanical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong
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J. Acoust. Soc. Am. 109, 1011–1022 (2001)
Article history
Received:
August 22 2000
Accepted:
December 01 2000
Citation
Hon Yiu Wong, Kai Ming Li; Prediction models for sound leakage through noise barriers. J. Acoust. Soc. Am. 1 March 2001; 109 (3): 1011–1022. https://doi.org/10.1121/1.1345698
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