音响系统设备 第4部分：麦克风

[中文适用范围]： IEC 60268的这一部分规定了音响系统麦克风的电阻抗、灵敏度、方向响应模式、动态范围和外部影响的测量方法，还详细说明了制造商要规定的特性。它适用于所有语音和音乐应用的音响系统麦克风。它不适用于测量麦克风，但它确实适用于具有多个通道的麦克风的每个音频通道，例如用于立体声或类似用途。它还适用于嵌入式麦克风和具有数字音频输出的麦克风的模拟特性。就本国际标准而言，麦克风包括变压器、前置放大器或构成麦克风组成部分的其他元件等所有设备，直至制造商指定的输出端子。第 6 章至第 21 章考虑了麦克风的主要特性。附件 A 和附件 C 考虑了其他特性。 注：本文件中指定的特性并不描述麦克风的主观响应。需要进一步的工作来找到新的定义和测量程序，以便稍后引入至少一些用于描述麦克风性能的主观描述的客观特征。 [外文原描述]： IEC 60268-4:2018 specifies methods of measurement for the electrical impedance, sensitivity, directional response pattern, dynamic range and external influences of sound system microphones, and also details the characteristics to be specified by the manufacturer. It applies to sound system microphones for all applications for speech and music. It does not apply to measurement microphones, but it does apply to each audio channel of microphones having more than one channel, for example for stereo or similar use. It is also applicable to flush-mounted microphones and to the analogue characteristics of microphones with digital audio output. For the purposes of this International Standard, a microphone includes all such devices as transformers, pre-amplifiers, or other elements that form an integral part of the microphone, up to the output terminals specified by the manufacturer. The major characteristics of a microphone are considered in Clauses 6 to 21. Additional characteristics are considered in Annex A and Annex C. IEC 60268-4:2018 cancels and replaces the fifth edition published in 2014. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) subclause 19.4 on "pop" measurement replaces Annex C; b) new Annex D for noise measurements in the digital domain.