包装机械噪声声功率级的测定--简易法
Determination of sound power level of noises of packaging machinery Simplified method
1994-07-18
GB/T 1859.2-2015
往复式内燃机 声压法声功率级的测定 第2部分：简易法
Reciprocating internal combustion engines—Measurement of sound power level using sound pressure—Part 2: Survey method
2015-12-10
GB/T 1859.4-2017
往复式内燃机 声压法声功率级的测定 第4部分：使用标准声源简易法
Reciprocating internal combustion engines—Measurement of sound power levels using sound pressure—Part 4:Survey method using a reference sound source