IEC 60942:2017 电声学 - 声音校准器

标准编号：IEC 60942:2017

中文名称：电声学 - 声音校准器

英文名称：Electroacoustics - Sound calibrators

发布日期：2017-11-29

标准范围

新的！IEC 60942:2017作为IEC 60942:2017 RLV提供，其中包含国际标准及其红线版本，显示了与上一版本相比技术内容的所有变化。IEC 60942:2017规定了三类声音校准器的性能要求:LS类（实验室标准）、1类和2类。LS类仪器的可接受限度最小，2类仪器的可接受限度最大。LS级声音校准器通常仅在实验室使用；1类和2类被认为是现场使用的声音校准器。根据IEC 61672-1的规定，1类声音校准器主要用于1类声级计，2类声音校准器主要用于2类声级计。LS级声音校准器的验收限值基于实验室标准麦克风的使用，如IEC 61094-1、用于证明符合本文件的要求。1类和2类声音校准器的验收限值基于IEC 61094-4中规定的工作标准麦克风的使用，以证明符合本文件的要求。第四版取消并取代了2003年出版的第三版，这是对第三版的技术修订。与上一版相比，此版本包括以下重大技术变更:a)删除类别名称LS/C类、1/C类和2/C类；b)增加另外两个类别名称，LS/M类和1/M类，特别是用于活塞式电话；c)增加了用于评估符合规范的修订标准:当（a）与设计目标的测量偏差不超过适用的可接受限度，以及（b）测量的不确定度不超过相应的最大值时，现在证明符合性。允许的不确定性；d)对声压级稳定性的短期级波动测试的修改；e)改为某些环境试验条件以避免结冰；f)增加使用横向电磁(TEM)波导的射频场抗扰度的替代测试。

NEW!IEC 60942:2017 is available as IEC 60942:2017 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 60942:2017 specifies the performance requirements for three classes of sound calibrator: class LS (Laboratory Standard), class 1 and class 2. Acceptance limits are smallest for class LS and greatest for class 2 instruments. Class LS sound calibrators are normally used only in the laboratory; class 1 and class 2 are considered as sound calibrators for field use. A class 1 sound calibrator is primarily intended for use with a class 1 sound level meter and a class 2 sound calibrator primarily with a class 2 sound level meter, as specified in IEC 61672-1. The acceptance limits for class LS sound calibrators are based on the use of a laboratory standard microphone, as specified in IEC 61094-1, for demonstrations of conformance to the requirements of this document. The acceptance limits for class 1 and class 2 sound calibrators are based on the use of a working standard microphone, as specified in IEC 61094-4, for demonstrations of conformance to the requirements of this document. This fourth edition cancels and replaces the third edition published in 2003, of which it constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) deletion of the class designations, class LS/C, class 1/C and class 2/C;
b) addition of two further class designations, class LS/M and class 1/M, specifically for pistonphones;
c) addition of an amended criterion for assessing conformance to a specification: conformance is now demonstrated when (a) measured deviations from design goals do not exceed the applicable acceptance limits and (b) the uncertainty of measurement does not exceed the corresponding maximum-permitted uncertainty;
d) modification to the short-term level fluctuation test of the sound pressure level stability;
e) change to some environmental test conditions to avoid icing;
f) addition of an alternative test for immunity to radio-frequency fields using transverse electromagnetic (TEM) waveguides.

标准预览图