印刷机械 噪声声功率级测定方法
Print a grade of survey method of power of sound of mechanical noise
2004-10-20
GB/T 14255-2015
家用缝纫机机头 噪声声功率级的测试方法
Household sewing machines head—Method of sound power levels of noise emitted
2015-09-11
QB/T 4599-2013
工业用缝纫机 噪声声功率级的试验方法
Industrial sewing machine Test method of sound power levels of noise
2013-12-31
GB/T 33928-2017
往复式内燃机 排气消声器测量方法 声压法排气噪声声功率级和插入损失及功率损失比
Reciprocating internal combustion engines—Measurement method for exhaust silencers—Sound power level of exhaust noise and insertion loss using sound pressure and power loss ratio
2017-07-12
ISO/TS 19425-2024
Reciprocating internal combustion engines — Measurement method for air cleaners — Sound power level of combustion air inlet noise and insertion loss using sound pressure
往复式内燃机空气滤清器测量方法燃烧空气入口噪声声功率级和声压插入损失