标准摘要
[中文适用范围]： 定义了 U 加权滤波器的电气特性，主要与满足 IEC 651 要求的声级计一起使用。当需要测量超声波分量频率时，实践是测量未加权的频率。 [外文原描述]： This standard specifies the electrical characteristics of a U-weighting filter mainly for use with sound level meters meeting the requirements of IEC 651 for the measurement of audible sound in the presence of ultrasound.
英文名称Filters for the measurement of audible sound in the presence of ultrasound