文献类型：期刊文献

英文题名：Experimental and Theoretical Analysis of Sound Absorption Properties of Finely Perforated Wooden Panels

作者：Song, Boqi[1] Peng, Limin[1] Fu, Feng[1] Liu, Meihong[1] Zhang, Houjiang[2]

第一作者：Song, Boqi

通信作者：Peng, LM[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, State Forestry Adm, Key Lab Wood Sci & Technol, Beijing 100091, Peoples R China;[2]Beijing Forestry Univ, Sch Technol, Beijing 100083, Peoples R China

年份：2016

卷号：9

期号：11

外文期刊名：MATERIALS

收录：;EI(收录号：20165003112760);Scopus(收录号：2-s2.0-85002376309);WOS:【SCI-EXPANDED(收录号:WOS:000390114400028)】；

基金：The work was supported by The National Key Technology R&D Program during the 12th Five-year Plan Period "Key technology and demonstration in manufacturing wood-based renovation materials of sound insulation and heat generation" (2015BAD14B04).

语种：英文

外文关键词：wooden perforated panels; tiny hole; relative impedance; sound absorption properties; base material characteristics

摘要：Perforated wooden panels are typically utilized as a resonant sound absorbing material in indoor noise control. In this paper, the absorption properties of wooden panels perforated with tiny holes of 1-3 mm diameter were studied both experimentally and theoretically. The Maa-MPP (micro perforated panels) model and the Maa-Flex model were applied to predict the absorption regularities of finely perforated wooden panels. A relative impedance comparison and full-factorial experiments were carried out to verify the feasibility of the theoretical models. The results showed that the Maa-Flex model obtained good agreement with measured results. Control experiments and measurements of dynamic mechanical properties were carried out to investigate the influence of the wood characteristics. In this study, absorption properties were enhanced by sound-induced vibration. The relationship between the dynamic mechanical properties and the panel mass-spring vibration absorption was revealed. While the absorption effects of wood porous structure were not found, they were demonstrated theoretically by using acoustic wave propagation in a simplified circular pipe with a suddenly changed cross-section model. This work provides experimental and theoretical guidance for perforation parameter design.