水声材料低频声性能的驻波管测量  

Measurement for Low-frequency Properties of Underwater Acoustic Materials in a Standing Wave Tube

作　　者：李水[1] 沈建新[1] 唐海清[1] 张晓岚[1] 

机构地区：[1]杭州应用声学研究所,浙江富阳311400

出　　处：《计量学报》2003年第3期221-224,共4页Acta Metrologica Sinica

摘　　要：介绍一种用于水声材料低频声性能测量的驻波管测试系统。该系统采用双水听器传递函数法来测量材料样品在背衬下的低频反射系数 ,测量频率低于 1kHz,管子的内径为 85mm。文中首先对测量方法和系统构成作必要的说明 ,然后对水 空气自由界面的反射系数进行测量来验证本系统的测量方法 ,通过对均匀橡胶材料样品的测量 。A standing wave tube measurement system is presented for measuring low frequency acoustic properties of underwater acoustic materials. The two hydrophones transfer function method is adopted to measure the reflection coefficients of the material samples under the backing. The measuring frequencies are below 1 kHz and the inside diameter of the tube is 85 mm Long. The measurement method and constitutions of the system are described first. Then the method has been verified by measuring the refection coefficients of air water free interface and the measurement uncertainty of the system also been analyzed by testing a homogeneous rubber sample.

关 键 词：计量学 水声材料 低频声性能 反射系数 驻波管 

分 类 号：TB95[一般工业技术—计量学]