SNV NF EN 25136:1994现行
Acoustics - Determination Of Sound Power Radiated Into A Duct By Fans - In-duct Method
出版：Swiss Standards
专家解读视频
Specifies a method for the determination of the acoustic power radiated into a duct by fans and other aerodynamic sound sources (flaps, throttles, boxes). The source under test shall produce a stationary sound. Test duct diameters may range from 0,15 m to 2 m. Measurements can be carried out with air temperatures between -50 degree C and +70 degree C provided that the flow velocity does not exceed 30 m/s, and the maximum swirl angle is 15 degree.
"Indice de classement: SNV NF S31-063" (12/2001)
DIN EN 25136 (1994-02) - Identical
ISO 5136:2003 - Identical
NF EN 25136:1994 - Identical
DIN EN 25136 : 1994 - Identical
