基于混响法的微穿孔板后空腔吸声特性研究
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摘要
表征吸声材料的主要物理参量一般有:吸声系数a、流阻Rf、孔隙率q、结构因子s。在噪声控制工程中,最常用的是吸声系数a,而a的大小与Rf、q、s是密切相关的。本文采用混响法测量微穿孔板后空腔吸声系数,研究微穿孔板后空腔对吸声效果的影响。实验表明,通过对比后空腔D=0mm和D=100mm吸声数据验证得出微孔板加上一定的后空腔可以做成宽频带良好的吸声结构。
The main physical parameters that characterize sound absorption materials are generally sound absorption coefficient a,flow resistance Rf,porosity qand structure factor s. In noise control engineering,the most commonly used sound absorption coefficient is a,and the size of a is closely related to Rf,q,s. In this paper,the sound absorption coefficient of the cavity behind the microperforated plate is measured by reverberation method,and the influence of the cavity behind the microperforated plate on the sound absorption effect is studied. Experiments show that by comparing the sound absorption data of the rear cavity D = 0 mm and D = 100 mm,it can be concluded that the microporous plate with a certain rear cavity can make a good sound absorption structure in broadband.
The main physical parameters that characterize sound absorption materials are generally sound absorption coefficient a,flow resistance Rf,porosity qand structure factor s. In noise control engineering,the most commonly used sound absorption coefficient is a,and the size of a is closely related to Rf,q,s. In this paper,the sound absorption coefficient of the cavity behind the microperforated plate is measured by reverberation method,and the influence of the cavity behind the microperforated plate on the sound absorption effect is studied. Experiments show that by comparing the sound absorption data of the rear cavity D = 0 mm and D = 100 mm,it can be concluded that the microporous plate with a certain rear cavity can make a good sound absorption structure in broadband.
引文
[1]宁景锋,赵桂平.倾斜微穿孔板结构的吸声特性研究[J].噪声与振动控制,2018(s1).
[2]马大猷.微穿孔板的实际极限[J].声学学报,2006,31(6):481~484.
[3]王鹏,王敏庆,刘彦森,等.并联微穿孔板吸声结构研究[J].压电与声光,2008,30(4):489~491.
[4]马大猷.微穿孔板吸声体的准确理论和设计[J].声学学报,1997(5):385~394.
[5]刘克.微穿孔板和微缝板吸声体研究进展[J].应用声学,2002,21(1):3~6.
[6]刘克,Nocke.扩散场内微穿孔板吸声特性的实验研究[J].声学学报,2000(3):211~218.
[7]Liu J,Bao W,Shi L,et al. General regression neural net-work for prediction of sound absorption coefficients of sandwich structurenonwoven absorbers[J]. Applied Acoustics,2014,76(1):128~137.
[8]Tayong R,Dupont T,Leclaire P. Experimental investigationof holes interaction effect on the sound absorptioncoefficient of micro-perforated panels under high and medium sound levels[J]. Applied A-coustics,2011,72(10):777~784.
[9]沈苏.微穿孔板结构在管道声源特性测量中的应用分析[J].声学学报,2011(3):281~290.
[10]Belous A A,Korol’Kov A I,Shanin A V. Experimental Esti-mation of the Frequency-Dependent Reflection Coefficient of a Sound-Absorbing Material at Oblique Incidence[J]. Acoustical Physics,2018,64(2):158~1.
[2]马大猷.微穿孔板的实际极限[J].声学学报,2006,31(6):481~484.
[3]王鹏,王敏庆,刘彦森,等.并联微穿孔板吸声结构研究[J].压电与声光,2008,30(4):489~491.
[4]马大猷.微穿孔板吸声体的准确理论和设计[J].声学学报,1997(5):385~394.
[5]刘克.微穿孔板和微缝板吸声体研究进展[J].应用声学,2002,21(1):3~6.
[6]刘克,Nocke.扩散场内微穿孔板吸声特性的实验研究[J].声学学报,2000(3):211~218.
[7]Liu J,Bao W,Shi L,et al. General regression neural net-work for prediction of sound absorption coefficients of sandwich structurenonwoven absorbers[J]. Applied Acoustics,2014,76(1):128~137.
[8]Tayong R,Dupont T,Leclaire P. Experimental investigationof holes interaction effect on the sound absorptioncoefficient of micro-perforated panels under high and medium sound levels[J]. Applied A-coustics,2011,72(10):777~784.
[9]沈苏.微穿孔板结构在管道声源特性测量中的应用分析[J].声学学报,2011(3):281~290.
[10]Belous A A,Korol’Kov A I,Shanin A V. Experimental Esti-mation of the Frequency-Dependent Reflection Coefficient of a Sound-Absorbing Material at Oblique Incidence[J]. Acoustical Physics,2018,64(2):158~1.