JB/T 7253-1994 in English

本标准规定了摆线针轮减速机噪声声功率级测定的测试条件、测试仪器、测点位置及数量、声功率级的计算以及测试结果的判定原则。 本标准适用于在符合规定的试验场地（即环境修正量K2小于或等于3dB）测定减速机的A计权声功率级。在有要求时，根据本标准也可测定频带声功率级和指向性指数。

Scope

This standard specifies the test conditions, test instruments, location and number of measuring points, calculation of sound power levels, and judgment principles for test results for the determination of noise and sound power levels of cycloidal pinwheel reducers. This standard is applicable to the measurement of the A-weighted sound power level of the reducer in a test site that meets the regulations (that is, the environmental correction amount K2 is less than or equal to 3dB). When required, frequency band sound power level and directivity index can also be determined according to this standard.