Reference number
ISO 5136:1990
ISO 5136:1990
Acoustics — Determination of sound power radiated into a duct by fans — In-duct method
Edition 1
1990-12
Withdrawn
ISO 5136:1990
11135
Withdrawn (Edition 1, 1990)

Abstract

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.

General information

  •  : Withdrawn
     : 1990-12
    : Withdrawal of International Standard [95.99]
  •  : 1
     : 22
  • ISO/TC 43/SC 1
    91.120.20 
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