Sound Absorption Properties of Fiber and Porous Materials

Abstract:

The porous materials, such as glass wool or foam, are generally used to attenuate noise. The most fundamental acoustic property of these porous materials is their sound absorption coefficient. The purpose of this paper is sintered fiber and porous materials sound absorption properties investigated. Sound absorption properties of sintered Al fiber has over 0.7 of sound absorption coefficient with 800-2000Hz frequency for 0.6 relative density and 10mm thickness. NRC (noise reduction coefficient) is 0.73. Metal foam have good sound absorption rate at 2000 ~ 4000Hz.

• Periodical: Materials Science Forum (Volumes 475-479)
• Pages: 2687-2690
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.475-479.2687
• Online since: January 2005
• Authors: Bo Young Hur, Bu Keoun Park, Dong-In Ha, Yong Su Um
• Keywords: Aluminum Fiber, Metal Foam, Sound Absorption

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