摘要
A new acoustic barrier structure with resonant sound of micro-perforation board absorption structure and impedance composite sound-absorption structure is proposed.The acoustic impedance and the sound-absorption coefficient of the acoustic structure are calculated via means of equivalent circuit.MATLAB is used to calculate the relationship between the parameters of the ontology structure and the sound-absorption coefficient and the sound insulation.It is revealed that the sound barrier of the new ontology structure is 7.659.80 dB,which is more than the sound barrier of the traditional reflective structures.The relationships among the parameters of sound-absorption structure,sound-absorption coefficient,and sound insulation performance are obtained.In addition,the parameters can be transformed to satisfy the noise reduction requirements of various road sections,which has a admirable adaptability.The acoustic barrier can have tremendous acoustic performance only if there is a splendid sound insulation in the traffic noise frequency band.
A new acoustic barrier structure with resonant sound of micro-perforation board absorption structure and impedance composite sound-absorption structure is proposed. The acoustic impedance and the sound-absorption coefficient of the acoustic structure are calculated via means of equivalent circuit. MATLAB is used to calculate the relationship between the parameters of the ontology structure and the sound-absorption coefficient and the sound insulation. It is revealed that the sound barrier of the new ontology structure is 7.65-9.80 dB, which is more than the sound barrier of the traditional reflective structures. The relationships among the parameters of sound-absorption structure, sound-absorption coefficient, and sound insulation performance are obtained. In addition, the parameters can be transformed to satisfy the noise reduction requirements of various road sections, which has a admirable adaptability. The acoustic barrier can have tremendous acoustic performance only if there is a splendid sound insulation in the traffic noise frequency band.
作者
ZHU Congyun
WU Rui
HUANG Panxu
DING Guofang
HUANG Qibai
朱从云;吴睿;黄盼许;丁国芳;黄其柏(School of Mechanical Science&Engineering,Zhongyuan University of Technology,Zhengzhou 450007,China;School of Mechanical Science&Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)
基金
National Natural Science Foundation of China(No.51175195)
Guiding Plan of Textile Industry Federation,China(No.2017053)
