Numerical and experimental study on the suppression of sound radiation from sound source in the duct by MPP

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review


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.
Original languageEnglish
Title of host publication21st International Congress on Sound and Vibration 2014, ICSV 2014
PublisherInternational Institute of Acoustics and Vibrations
Number of pages8
ISBN (Electronic)9781634392389
Publication statusPublished - 1 Jan 2014
Event21st International Congress on Sound and Vibration 2014, ICSV 2014 - Beijing, China
Duration: 13 Jul 201417 Jul 2014


Conference21st International Congress on Sound and Vibration 2014, ICSV 2014

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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