ISO 5136:1990Withdrawn

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

Acoustique — Détermination de la puissance acoustique rayonnée dans un conduit par des ventilateurs — Méthode en conduit

This edition has been replaced by ISO 5136:2003.

Abstract / 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

Amendments & corrigenda

ISO 5136:1990/Cor 1:1993WithdrawnAcoustics — Determination of sound power radiated into a duct by fans — In-duct method — Technical Corrigendum 1International Standard · Published 2 Sep 1993 · ISO/TC 43/SC 1

Replaced by

ISO 5136:2003PublishedAcoustics — Determination of sound power radiated into a duct by fans and other air-moving devices — In-duct methodInternational Standard · Published 31 Mar 2003 · ISO/TC 43/SC 1