电声学.声级计.第2部分:型式评定试验

[中文适用范围]： IEC 61672 的这一部分提供了验证是否符合 IEC 61672-1 中规定的时间计权声级计@积分平均声级计@和积分声级计所有强制性规范所需的测试详细信息。根据需要，模式评估测试适用于多通道声级计@的每个通道。测试和测试方法适用于1级和2级声级计。目的是确保所有实验室使用一致的方法来进行模式评估测试。注 1：除非另有说明，本文件中提及的 IEC 61672-1、IEC 61672-2、和 IEC 61672-3 均指第二版。注 2：IEC 61672-2:2003 中给出了设计符合 IEC 61672-1:2002 规范的声级计模式评估测试程序。 [外文原描述]： IEC 61672-2:2013 provides details of the tests necessary to verify conformance to all mandatory specifications given in IEC 61672-1 for time-weighting sound level meters, integrating-averaging sound level meters, and integrating sound level meters. Pattern-evaluation tests apply for each channel of a multi-channel sound level meter, as necessary. Tests and test methods are applicable to class 1 and class 2 sound level meters. The aim is to ensure that all laboratories use consistent methods to perform pattern-evaluation tests. This second edition cancels and replaces the first edition published in 2003. This second edition constitutes a technical revision, the main technical changes with regard to the previous edition concern conformance to specifications which is now demonstrated when measured deviations from design goals do not exceed the applicable acceptance limits, and when the uncertainty of measurement does not exceed the corresponding maximum permitted uncertainty, with both uncertainties determined for a coverage probability of 95 %. In this document, references to IEC 61672-1, IEC 61672-2, and IEC 61672-3 refer to the second editions unless stated otherwise. Procedures for the pattern-evaluation testing of sound level meters designed to conform to the specifications of IEC 61672-1:2002 were given in IEC 61672-2:2003.