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Norm
ISO 5136:1990
Issue date: 1990 12 06
Acoustics — Determination of sound power radiated into a duct by fans — In-duct method
Gives a method for testing ducted fans. Applies to fans which emit steady, broadband, narrow-band and discrete-frequency sound. Applies to air temperatures between -50 °C...
Withdrawn: 2003 03 31
Publisher:
International Organization for Standardization
Format:
Digital | 22 Pages
Language:
English
Currently valid:
ICS
Gives a method for testing ducted fans. Applies to fans which emit steady, broadband, narrow-band and discrete-frequency sound. Applies to air temperatures between -50 °C and +70 °C. The test duct diameter range is from 0,15 m to 2 m. The maximum flow velocity is 30 m/s and the maximum swirl angle is 15°. An example of a method for determining the angle of swirl is given in annex F. The one-third octave band centre frequency range is from 50 Hz to 10 000 Hz.
ISO 5136:2003
2003 03 31
Acoustics — Determination of sound power radiated into a duct by fans and other air-moving devices —...
Norm
ISO 5136:1990
1990 12 06
Acoustics — Determination of sound power radiated into a duct by fans — In-duct method
Norm
↖
Norm
Issue date :
2003 03 31
Acoustics — Determination of sound power radiated into a duct by fans and other air-moving devices — In-duct method
