弹性联接对钢龙骨轻板隔墙隔声量的影响

现有估计双层轻板隔墙隔声量的方法是从刚性声桥出发的,它对钢龙骨隔墙并不适用。后者由于龙骨本身具有侧向弹性作用而使中高频的隔声量有所提高。本文提出了估计钢龙骨轻板隔墙隔声量的表达式,并与实验结果符合良好。本文还对龙骨两侧附加弹性阻尼垫条对隔声改善作用进行了讨论。对这样一种构造较为复杂的隔墙现在也能用一组简单表达式来确切地预计其隔声量。

EFFECT OF RESILIENT CONNECTION ON SOUND TRANSMISSION LOSS OF METAL STUD DOUBLE PANEL PARTITIONS

Existing techniques for predicting sound TL of double panel partitions are based on the assumption that the mechanical connection of the stud is a rigid sound bridge, but they provide unrealistic estimates of the TL in the ease of metal stud partitions. The TL of the latter is significantly improved at mid and higher frequencies owing to the lateral resilient effect of the stud itself. A modified expression for predicting the TL of metal stud partition is thus given in this paper, which is in good agreement with experimental results.
The effects of additional resilient pad strip on both sides of the stud are discussed in the latter portion of this paper. It is now shown that even for such a complex structure the TL can also be determined by means of a set of simple expressions.