标准摘要
[中文适用范围]： IEC 60268-7:2025 CMV 包含标准正文及其带注释的版本。注释版为用户快速、便捷地比较 IEC 60268-7:2025 第4版与此前 IEC 60268-7:2010+AMD1:2020 CSV 第3.1版之间的所有变更提供了便利。此外，IEC TC 100 专家的注释还解释了最重要的变更原因，或对内容中的任何部分进行说明。 IEC 60268-7:2025 适用于用于人耳内或耳上的耳机、耳塞、耳机和耳套。它还适用于构成耳机系统组成部分的设备，如前置放大器、无源网络和电源。本文件不涉及以下内容： - 安全性，相关内容可参见 IEC 62368-1 或其他适用标准； - 耳机麦克风的特性，相关内容可参见 IEC 60268-4； - 助听设备的耳塞及其他装置，相关内容可参见 IEC 60118-0； - 用于听力测试的耳机； - 作为主动耳罩系统组成部分的耳机及其他设备（尽管本文档的部分内容可能仍适用）； - 主动降噪特性，相关内容可参见 IEC 60268-24。 本文件规定了制造商在规格书中包含的特性及其相关测量方法。它包括对不同类型耳机的分类，这些耳机主要根据换能器与耳朵之间的声学耦合方式进行分类，并提供可用于标记的分类代码。制造商在本文档中提供的额定条件和特性通常不用于外部验证。额定特性的测量方法为信息性内容，旨在帮助制造商实现测试的重复性和数据对比。其他所有规格和测试则用于制造商自行测试以及外部测试与验证。 第四版取消并替换了2010年发布的第三版及2020年的修订1。本版为技术修订版。与前一版相比，本版包含以下重大技术变更： - 与 IEC 60268-7:2010/AMD1:2020 合并； - 对条款、子条款及附录进行重构与重新编号； - 增加了自由场/扩散场补偿频率响应的有效频率范围； - 更新了调制失真和差频失真的测量方法； - 增加了双音失真测量的细节（见附录I）； - 增加了立体声耳机左右跟踪响应的细节（见附录J）。 [外文原描述]： IEC 60268-7:2025 CMV contains both the official standard and its commented version. The commented version provides you with a quick and easy way to compare all the changes between IEC 60268-7:2025 edition 4.0 and the previous IEC 60268-7:2010+AMD1:2020 CSV edition 3.1. Furthermore, comments from IEC TC 100 experts are provided to explain the reasons of the most relevant changes, or to clarify any part of the content. IEC 60268-7:2025 is applicable to headphones, earphones, headsets and earsets, intended to be used on, or in, the human ear. It also applies to equipment, such as pre-amplifiers, passive networks and power supplies which form an integral part of the headphone system. This document does not deal with: - safety, for which reference is made to IEC 62368-1 or another appropriate standard; - the characteristics of microphones of headsets, for which reference is made to IEC 60268‑4; - earphones and other devices for hearing aids, for which reference is made to IEC 60118-0; - headphones for audiometry; - headphones and other devices which form part of an active ear-defender system, although some of the provisions of this document can be applicable; - active noise cancelation characteristics as covered by IEC 60268-24. This document specifies the characteristics which are included by the manufacturer in specifications, and relevant methods of measurement. It includes a classification of the different types of earphones, mainly characterized by the way in which the transducer is coupled acoustically to the ear, and a classification code which can also be used for marking. Rated conditions and characteristics in this document provided by the manufacturer are not generally intended for external verification. Measurement methods for rated characteristics are informative and are provided for the benefit of manufacturers for the purpose of test repeatability and data comparison. All other specifications and tests are provided for testing by the manufacturer and for external testing and verification. This fourth edition cancels and replaces the third edition published in 2010, and Amendment 1 of 2020. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - consolidated with IEC 60268-7:2010/AMD1:2020; - clause/subclause/annex reconstruction and renumbering; - addition of effective frequency range of the free-field / diffuse-field compensated frequency response; - update of measurement methods of modulation distortion and difference-frequency distortion; - addition of details of two-tone distortion measurements, see Annex I; - addition of details of left-right tracking response for stereo headphones, see Annex J.
英文名称Sound system equipment - Part 7: Headphones and earphones