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http://dx.doi.org/10.5050/KSNVN.2005.15.9.1003

A Study on the Sound Absorptive Characteristics and Performance of Parallel Perforated Plate Systems  

Hong, Byung-Kuk (서울산업대학교 에너지시스템공학과)
Song, Hwa-Young (서울산업대학교 에너지시스템공학과)
Seo, Seong-Won (서울산업대학교 기계공학과)
Lee, Dong-Hoon (서울산업대학교 에너지환경대학원)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.15, no.9, 2005 , pp. 1003-1008 More about this Journal
Abstract
The acoustic absorption of a multiple layer perforated plate system is very good near the resonance frequency region, while it has been regarded as a demerit that its frequency bandwidth is considerably narrow. In order to overcome such a demerit, the parallel perforated plates with different porosities are proposed. The sound absorption of such system composed of a parallel perforated plate is calculated by an equivalent electroatoustic circuit approach and validated by comparing the calculated absorption coefficients with those measured by the two-microphone impedance tube method. The sound absorptive characteristics and performance of parallel perforated plate systems are discussed from a standpoint of frequency bandwidth related with sound absorption.
Keywords
Acoustic Impedance; Equivalent Electroacoustic Circuit Approach; Perforated Plate System; Sound Absorption Coefficient;
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