ISO 6394:2008规定了一种确定土方机械在操作员位置处的排放声压级的方法，在机器静止且发动机在空载条件下以额定转速运行时，根据时间平均a加权排放声压级进行测量。 适用于ISO 6165中定义的土方机械，以及ISO 6393:2008附录A中的规定。

ISO 6394:2008 specifies a method for determining the emission sound pressure level of earth-moving machinery at the operator's position, measured in terms of the time-averaged A-weighted emission sound pressure level while the machine is stationary with the engine operating at the rated speed under no-load condi-tions. It is applicable to earth-moving machinery as defined in ISO 6165 and specified in ISO 6393:2008, Annex A.