本标准规定了信息系统发出的空气噪声的测量方法 技术和电信设备。迄今为止，已经应用了各种各样的方法 由个别制造商和用户提供，以满足特定设备或应用需求。这些 在许多情况下，不同的做法使得比较噪声排放变得困难。这个标准 简化了此类比较，并且是声明车辆噪声排放水平的基础 信息技术和电信设备。本标准在技术上与ECMA-74部分相同。

This Standard specifies methods for the measurement of airborne noise emitted by information technology and telecommunications equipment. Hitherto, a wide variety of methods have been applied by individual manufacturers and users to satisfy particular equipment or application needs. These diverse practices have, in many cases, made comparison of noise emission difficult. This Standard simplifies such comparisons and is the basis for the declaration of the noise emission levels of information technology and telecommunications equipment.This Standard is technically identical to parts of ECMA-74.