标准摘要
[中文适用范围]： 本文件适用于具有通过环境噪声检测麦克风和降噪信号处理电路产生的换能器输出声音来减少用户听到的噪声功能的主动降噪耳机和耳塞。本文件规定了此类耳机或耳塞的术语和定义、需指定的特性以及测量和评估方法。噪声检测麦克风安装在耳机或耳塞的主体、表面或附件上。信号处理电路包括模拟和数字电子电路。本文件不涉及用于听力保护的设备。降噪特性测量方法也可应用于不具备主动降噪功能的耳机和耳塞。 [外文原描述]： IEC 60268-24:2023 is applicable to active acoustic noise-cancelling headphones and earphones which have the function of reducing the noise heard by the user by the output sound from the transducer generated by the environment noise detection microphone and the noise reduction signal processing circuit. This document specifies the terms and definitions of this type of headphones or earphones, the characteristics to be specified, and the measurement and evaluation methods. The noise detection microphone or microphones are mounted in the body, on the surface, or on an accessory of the headphones or earphones. Signal processing circuits are analogue and digital electronic circuits. This document does not deal with equipment intended for hearing protection. The noise cancelling characteristic measurement methods can be applied to headphones and earphones having no active noise cancelling function.
英文名称Sound system equipment - Part 24: Headphones and earphones - Active acoustic noise cancelling characteristics