本SAE推荐实施规程适用于额定车辆总重4540 kg以上的商用车，该商用车配有在正常操作条件下使用的空气制动器。该程序包含了高温和低温测试矩阵，但没有充分考虑环境对制动器尖叫声的影响。这方面的许多研究目前正在进行中。本文件将制动尖叫声定义为道路车辆上的空气盘式制动器和鼓式制动器在500 Hz和17 kHz之间至少80 dB（a）的峰值噪音水平。

This SAE Recommended Practice applies to commercial vehicles above 4540 kg of gross vehicle weight rating equipped with air brakes used under normal operating conditions. The procedure incorporates high and low-temperature test matrices, but does not fully account for the effects of the environment on brake squeal. Much research is currently underway in this area. This document defines brake squeal as a peak noise level of at least 80 dB(A) between 500 Hz and 17 kHz for air disc and drum brakes on on-road vehicles.