ISO 5136:1990
Withdrawn
View Superseded by
Acoustics — Determination of sound power radiated into a duct by fans — In-duct method
Hardcopy , PDF
12-06-1990
04-09-2025
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.
| Committee |
ISO/TC 43/SC 1
|
| DocumentType |
Standard
|
| Pages |
22
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
|
| SupersededBy |
| Standards | Relationship |
| UNE-EN 25136:1995 | Identical |
| BS EN 25136:1994 | Identical |
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