本SAE标准规定了测量自驱动挖沟机发出的操作员和外部声级的程序，无论发动机尺寸如何。本程序不包括倒车报警器、喇叭或铺路断路器等附件的操作。使用本程序获得的声级是可重复的，代表机器在实际现场操作条件下产生的较高声级范围，但不一定代表现场使用周期内的平均声级。 操作员声音暴露的测量和计算应遵循SAE J1166。

This SAE Standard specifies procedures for measuring operator and exterior sound levels emitted by self-powered trenching machines regardless of engine size. This procedure does not cover operation of devices such as backup alarms, horns, or accessories such as paving breakers. The sound levels obtained using this procedure are repeatable and representative of the higher range of sound levels generated by machines under actual field operating conditions, but do not necessarily represent the average sound level over a field use cycle. Measurement and calculation of the operator's sound exposure should follow SAE J1166.