Composite panels for reducing noise in air conditioning and ventilation systems

Choy, Yat-Sze and Lau, Kin-Tak and Wang, C. and Chau, C. W. and Liu, Yang and Hui, D. (2009) Composite panels for reducing noise in air conditioning and ventilation systems. Composites Part B: Engineering, 40 (4). pp. 259-266. ISSN 1359-8368


The plate silencer [1] that consists of an expansion chamber with two side-branch cavities covered by a light panel can achieve a desirable noise reduction in broadband theoretically. The concept is similar to drum silencer [Choy YS, Huang L. Experimental studies of drum-like silencer. J Acoust Soc Am 2002;112:2026-35]. To attain optimal noise reduction, either the membrane of the silencer should be of minimal weight while retaining very high tensile strength or the panel should be kept at very high bending stiffness that is dependent on its geometry and mechanical properties. To achieve such goal, various kinds of composite system such as carbon fibres or aluminum were mounted on light core foam to build a noise reflection panel. A design of composite panels which can provide a reduction in panel weight as well as enhance the bending stiffness, is introduced in this paper. Predictions of the new model are to be compared with the normal foam plate in the aspects of noise reflection capability and performance of noise abatement apart from the material properties.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restriction to publshed version due to publisher copyright policy.
Faculty/School / Institute/Centre: Current - USQ Other
Faculty/School / Institute/Centre: Current - USQ Other
Date Deposited: 05 Jul 2011 10:34
Last Modified: 17 Oct 2014 01:51
Uncontrolled Keywords: carbon-fibre; foam; vibration; composite panels; composite systems; expansion chambers; high-tensile strengths; noise reductions; noise reflections; optimal noise; reducing noise; ventilation systems
Fields of Research (2008): 09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
12 Built Environment and Design > 1201 Architecture > 120104 Architectural Science and Technology (incl. Acoustics, Lighting, Structure and Ecologically Sustainable Design)
09 Engineering > 0913 Mechanical Engineering > 091301 Acoustics and Noise Control (excl. Architectural Acoustics)
Fields of Research (2020): 40 ENGINEERING > 4016 Materials engineering > 401602 Composite and hybrid materials
33 BUILT ENVIRONMENT AND DESIGN > 3301 Architecture > 330105 Architectural science and technology
40 ENGINEERING > 4017 Mechanical engineering > 401701 Acoustics and noise control (excl. architectural acoustics)
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
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