Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/33802
Title: Numerical and experimental study on the suppression of sound radiation from sound source in the duct by MPP
Authors: Xi, Q
Choy, YS 
Cheng, L 
Tang, SK 
Issue Date: 2014
Publisher: International Institute of Acoustics and Vibrations
Source: 21st International Congress on Sound and Vibration 2014, ICSV 2014, 2014, v. 5, p. 3860-3867 (CD-ROM) How to cite?
Abstract: The control of low-frequency ducted fan noise such as in air-handling unit remains a challenging task due to limitation of the space and pressure drop problem. In this study, the micro- perforated panel (MPP) with shallow backed cavities is applied to reduce the noise radiation from the source in the duct. This device is proved to work effectively in the low frequency range. A two- dimensional numerical model has been built up in order to understand the physics behind of sound cancellation, to optimize the panel parameters and to investigate the sound intensity distribution. The numerical result is validated by experiments with a loudspeaker to simulate the sound source, and the measured data matches well with the numerical prediction. The desirable results obtained are beneficial for the design of realistic noise control device in compact configuration in controlling noise inside the air-handling unit.
Description: 21st International Congress on Sound and Vibration 2014, ICSV 2014, Beijing, 13-17 July 2014
URI: http://hdl.handle.net/10397/33802
ISBN: 9781634392389
Appears in Collections:Conference Paper

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