电声学.音响校准器

[中文适用范围]： 广泛，涉及各类专业音频校准装置，对于保障声学测量数据的准确性具有重要意义。 [外文原描述]： Specifies the performance requirements for three classes of sound calibrator. Sound calibrators are designed to produce a known effective sound pressure level or levels at a specified frequency or frequencies when coupled to specified models of microphone or specified configurations, for example, with or without protective grid.