标准摘要
[中文适用范围]： 规定了测定材料和物体的吸声系数、反射系数、表面阻抗或导纳的方法。 这些值是通过评估管中平面波的驻波模式来确定的，该驻波模式是由入射正弦平面波与从测试对象反射的平面波叠加而生成的。 [外文原描述]： Specifies a method for the determination of the sound absorption coefficient, reflection factor, surface impedance or admittance of materials and objects. The values are determined by evaluation of the standing wave pattern of a plane wave in a tube, which is generated by the superposition of an incident sinusiodal plane wave with the plane wave reflected from the test object.
英文名称Acoustics — Determination of sound absorption coefficient and impedance in impedance tubes — Part 1: Method using standing wave ratio