The structural design of combined absorber composed by MPP and multi-layer porous material based on VA One
Some experiments found that the low-frequncy sound absorption performance can be improved by inserting MPP into the multi-layer porous materials,but the theory modeling of this MPP-multi-layer porous combined absorber is too difficult to provide the guidance.Therefore,a new method is proposed in this paper,according to Atallas theory,the MPP can be treated as a rigid porous layer in this composite absorber,then the acoustic software (such as VA One) usually for dealing with multi-layer porous absorber can be chosen to its optimal design.Based on this method,a two-layer porous absorber is designed using the Foam Module of VA One,and the influence of different insert location of MPP in the two-layer porous absorber is analyzed,which shows the existence of optimum location.Moreover,the sound absorption of different MPP structure at the optimum location is also discussed which shows inserting the wider-band MPP structure is better.
Multi-layer sound absorber VA One MPP Porous material absorption coefficient
Xiuhua Duan Huanqin Wang Wenjuan Sun Deyi Kong Zhan Zhao
University of Science and Technology of China,Department of Automation,Hefei 230026,China Institute of Intelligent Machines,Chinese Academy of Sciences,Hefei,230031,PR China Institute of Electronics,Chinese Academy of Sciences,Beijing,10080,China
国际会议
沈阳
英文
91-96
2012-07-27（万方平台首次上网日期，不代表论文的发表时间）