中文摘要：

研究了膜内张力对其声学特性的影响,通过数值计算和实验测试得到了以下结论：刚度控制区内随张力的增加,隔声量曲线整体“抬高”了,20-100Hz的这段区域内隔声量最大提高了30dB,呈现非线性增长特性;阻尼控制区内隔声谷对应的频率随着张力的增加而按照一定的规律增大,且张力形成的“绷紧”效应大大降低了膜面振动,增加了隔声量峰值,100kPa张力对应的隔声量峰值明显超过10kPa的134.7%,对小的张力很敏感;质量控制区1000Hz以上的频率段内张力对薄膜隔声性能基本无影响,质量定理能够很好的预测。张力对隔声量的影响都集中在刚度控制和阻尼控制区的中低频范围内,且影响巨大。

英文摘要：

The low frequency sound attenuation is a challenging issue and membrane -type acoustic material is a method to deal with it .However ,membranes have low TL （transmission loss）owing to membrane＆#39;s low density at low frequencies .We present the membrane tension affecting its acoustic characteristics based on the membrane‐type materials .Conclusion is drew through numerical simulation and impedance tube test ：the transmission loss curve is integrally lifted due to the increase of tension in the stiffness control zone ,increasing to 30 dB in a range of 20 Hz to 100 Hz and a nonlinear grow properties of TL curve is displayed ;In the damping control zone ,the frequencies corresponding to its TL valleys increase with the development of the tension and membrane surface vibration is deeply reduced by tenseness effect caused by tension which increase the TL peak value .A 134 .7% peak value augment is displayed in 100 kPa tension compared to 0 kPa acting on the membrane .And the TL shows high sensitivity to low tension .In the density control zone （above 1 000 Hz） ,the tension demonstrates little impact on membrane transmission loss properties which can be commendably predicted by mass law .The tremendous TL effect of tension based on membrane -type materials are concentrated in stiffness and damping control zones .The middle and low frequency transmission loss properties can be improved by this meaningful research .