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
Department of Civil and Structural Engineering
Pages: 79, [20] leaves : ill. (some col.) ; 30 cm
Language: English
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.
Access: restricted access

Files in This Item:
File Description SizeFormat 
b14852366.pdfFor All Users (off-campus access for PolyU Staff & Students only)5.56 MBAdobe PDFView/Open


Copyright Undertaking

As a bona fide Library user, I declare that:

  1. I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
  2. I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
  3. I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.

By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.

Show full item record

Please use this identifier to cite or link to this item: https://theses.lib.polyu.edu.hk/handle/200/3791