ISO 5136:1990
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
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Acoustics Determination of sound power radiated into a duct by fans In-duct method
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
12-03-2019
06-12-1990
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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.
| DocumentType |
Standard
|
| Pages |
22
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
|
| SupersededBy |
| Standards | Relationship |
| UNE-EN 25136:1995 | Identical |
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