楼板撞击声计权隔声量的确定

Determination of weight impact sound insulation to a floor slab

由实验测得的楼板撞击声级再通过受声室的吸声修正获得各个频程的规范化撞击声压级,而衡量楼板隔声的单一值指标是计权隔声量,其值通常采用标准曲线与规范化撞击声压级频率特性曲线相比较而获得,这种比较法较繁琐。为此,该文利用Matlab编程计算,直接根据实验数据计算出计权隔声量,相对于比较法而言,后者更为准确和方便。

The measured impact sound pressure levels are corrected by sound absorption within a receive chamber,and the standard impact sound pressure level at each frequency band is achieved.But,the weight impact insulation is a unique value that evaluates insulation properties of a floor.In generally,though,it is obtained through comparing criteria curve and standard impact sound insulation reduction curve,the comparing way is relative troublesome.So,the direct calculation of the weight insulation amount has proceeded by using Matlab programming.This approach,moreover,is more practical and accurate than the former one.