IEC 61672-3:2013描述了时间加权、积分平均和积分声级计的定期测试程序，这些仪器的设计符合IEC 61672-1第二版的1级或2级规范。本标准的目的是确保所有实验室以一致的方式进行定期测试。定期测试的目的是向用户保证声级计的性能符合IEC 61672-1的适用规范，适用于有限的一组关键测试和进行测试的环境条件。本版IEC 61672-3中所述的定期试验适用于制造商声称符合第二版IEC 61672-1规范的声级计。IEC 61672-3中所述的定期试验适用于声级计，该声级计的型号已经或尚未按照IEC61672第二版的试验程序获得负责型式认证的独立试验机构的型式认证- 2.第二版取消并取代2006年出版的第一版。第二版为技术修订版。关于之前的主要变化涉及到与规范的一致性，当测量到的与设计目标的偏差不超过适用的验收限值时，以及当测量不确定度不超过相应的最大允许不确定度时，这两个不确定度的确定覆盖率均为95%。在本文件中，除非另有说明，否则对IEC 61672-1、IEC 61672-2和IEC 61672-3的引用均指第二版。IEC 61672-3:2006中给出了设计为符合IEC 61672-1:2002规范的声级计的定期测试程序。

IEC 61672-3:2013 describes procedures for periodic testing of time-weighting, integrating-averaging, and integrating sound level meters that were designed to conform to the class 1 or class 2 specifications of the second edition of IEC 61672-1. The aim of the standard is to ensure that periodic testing is performed in a consistent manner by all laboratories. The purpose of periodic testing is to assure the user that the performance of a sound level meter conforms to the applicable specifications of IEC 61672-1 for a limited set of key tests and for the environmental conditions under which the tests were performed. Periodic tests described in this edition of IEC 61672-3 apply to sound level meters for which the manufacturer claims conformance to the specifications of the second edition of IEC 61672-1. Periodic tests described in IEC 61672-3 apply to sound level meters for which the model has been, or has not been, pattern approved by an independent testing organization responsible for pattern approvals in accordance with the test procedures of the second edition of IEC61672-2. This second edition cancels and replaces the first edition published in 2006. This second edition constitutes a technical revision. The main changes with regard to the previous 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 periodic testing of sound level meters designed to conform to the specifications of IEC 61672-1:2002 were given in IEC 61672-3:2006.