SOUND TRANSMISSION LOSS OF A DOUBLE-LEAF PARTITION WITH MICRO-PERFORATED PLATE INSERTION UNDER DIFFUSE FIELD INCIDENCE

Putra, Azma and Ismail, Ahmad Yusuf and Ayob, Md Razali (2013) SOUND TRANSMISSION LOSS OF A DOUBLE-LEAF PARTITION WITH MICRO-PERFORATED PLATE INSERTION UNDER DIFFUSE FIELD INCIDENCE. International Journal of Automotive and Mechanical Engineering (IJAME), 7 (Januar). pp. 1086-1095. ISSN ISSN: 2180-1606

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Abstract

In noise control applications, a double-leaf partition has been applied widely as a lightweight structure for noise insulation, such as in car doors, train bodies, and aircraft fuselages. Unfortunately, the insulation performance deteriorates significantly at mass-air-mass resonance due to coupling between the panels and the air in the gap. This paper investigates the effect of a micro-perforated panel (MPP), inserted in the conventional double-panel partition, on sound transmission loss at troublesome resonant frequencies. It is found that the transmission loss improves at this resonance if the MPP is located at a distance of less than half that of the air gap. A mathematical model is derived for the diffuse field incidence of acoustic loading.

Item Type:	Article
Subjects:	T Technology > TJ Mechanical engineering and machinery Q Science > QC Physics
Divisions:	Faculty of Mechanical Engineering > Department of Structure and Materials
Depositing User:	Dr Azma Putra
Date Deposited:	27 Jul 2013 15:11
Last Modified:	28 May 2015 04:00
URI:	http://eprints.utem.edu.my/id/eprint/8920
Statistic Details:	View Download Statistic

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