Noise control for fan duct system using reactive silencer

Pao Yue-kong Library Electronic Theses Database

Noise control for fan duct system using reactive silencer

 

Author: Leung, Ka-fung
Title: Noise control for fan duct system using reactive silencer
Degree: M.Sc.
Year: 1999
Subject: Air ducts -- Acoustic properties
Ventilation -- Noise
Noise control
Hong Kong Polytechnic University -- Dissertations
Department: Multi-disciplinary Studies
Dept. of Civil and Structural Engineering
Pages: 79, [20] leaves : ill. (some col.) ; 30 cm
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b1485236
URI: http://theses.lib.polyu.edu.hk/handle/200/3791
Abstract: This report deals with a theoretical, experimental study and factory testing (Case Study) for the reactive silencer applied for fan duct system. The benefits of new reactive silencer are high durability and can be used to substitute the commonly used dissipative silencer. The design parameters for the characteristics of the reactive Micro-perforated panel (MPP) silencer are discussed. The result of the laboratory testing and the case study shows that reactive silencer performs well at low and medium frequencies which frequently appear in the fan duct system. After the site measurement for the factory-tested MPP silencer installed at the Water Scrubber system of the market, the performance are found to be equivalent to conventional dissipative silencer. This is the first successful practical application of the reactive silencer in Water Scrubber System for a market.

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