sound transmission loss of a double-leaf partition with micro-perforated plate insertion under diffuse field incidence
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ID: 198988
2013
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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.
| Reference Key |
putra2013internationalsound
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|---|---|
| Authors | ;A. Putra;A. Y. Ismai;Md. R. Ayob |
| Journal | journal of marine science and engineering |
| Year | 2013 |
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