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ISO 5136:1990

Acoustics — Determination of sound power radiated into a duct by fans — In-duct method

Dec 6, 1990
95.99   Withdrawal of Standard   Mar 31, 2003

General information

95.99     Mar 31, 2003

ISO

ISO/TC 43/SC 1

International Standard

91.120.20  

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Scope

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.

Life cycle

NOW

WITHDRAWN
ISO 5136:1990
95.99 Withdrawal of Standard
Mar 31, 2003

CORRIGENDA / AMENDMENTS

WITHDRAWN
ISO 5136:1990/Cor 1:1993

REVISED BY

PUBLISHED
ISO 5136:2003