acoustic impedance

The product of the velocity and density of a rock is termed in the acoustic impedance.

岩石的波速和密度之乘积称为声波阴抗.

All children underwent routine otoscopic examinations of ear, nose and throat, and were also examined using the Madsen acoustic impedance audiometer.

均进行耳科常规及声阻抗检查，发现腭裂患儿中耳静态压力与声顺值，声镫骨肌反射引出率都低于正常儿童。

We followed up 25 subjects in 1-2 weeks, the results of pure-tone audiometric testing and acoustic impedance audiometry of 24 subjects were normal, and had no significant differences to those examined before administration.

给药后1-2周，共随访到25例正常受试者，其中24例复查纯音测听和声阻抗测试都在正常范围，与受试前纯音测听结果相较未见明显差异。

Methods To check on objective acoustic impedance and subjective pure tone audiometry.

方法对外伤性聋进行客观声导抗测试和主观纯音测试。

It may match the impedance of acoustic loads in order to increase transducing efficiency.

为提高换能效率,可以采用匹配声阻抗法.

Opposition to the flow of sound through a surface; acoustic resistance is the real component of acoustic impedance and acoustic reactance is the imaginary component.

声音在通过一个表面时受到的阻力；声阻是声阻抗的实部，声抗是声阻抗的虚部。

Negative coefficients occur where there is a decrease in acoustic impedance across the reflecting interface.

当反射界面上下两侧的声波组抗降低时,反射系数就会出现负值.