# ISO 5136:1990 — Withdrawn and superseded ISO standards

For ISO 5136:1990, item title is Acoustics — Determination of sound power radiated into a duct by fans — In-duct method; status code is 9599; successor is ISO 5136:2003; withdrawn / published date is 1990-12-06, recorded from its source on 2026-08-05.

- **Identifier:** ISO 5136:1990 _(verified: appears in the quote below)_
- **Item title:** Acoustics — Determination of sound power radiated into a duct by fans — In-duct method _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 5136:2003
- **Withdrawn / published date:** 1990-12-06 _(verified: appears in the quote below)_

## What the source says

> 11135,IS,,ISO 5136:1990,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,1990-12-06,1,['91.120.20'],ISO/TC 43/SC 1,9599,,[28316],"['en','fr']",22,"<p>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 o

## Source

- https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified: 2026-08-05. Review by: 2027-02-01.
Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).