# ISO 3744:1981 — Withdrawn and superseded ISO standards

For ISO 3744:1981, item title is Acoustics — Determination of sound power levels of noise sources — Engineering methods for free-field conditions over a reflecting plane; status code is 9599; successor is ISO 3744:1994; withdrawn / published date is 1981-05-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 3744:1981 _(verified: appears in the quote below)_
- **Item title:** Acoustics — Determination of sound power levels of noise sources — Engineering methods for free-field conditions over a reflecting plane _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 3744:1994
- **Withdrawn / published date:** 1981-05-01 _(verified: appears in the quote below)_

## What the source says

> 9239,IS,,ISO 3744:1981,Acoustics — Determination of sound power levels of noise sources — Engineering methods for free-field conditions over a reflecting plane,Acoustique — Détermination des niveaux de puissance acoustique émis par les sources de bruit — Méthodes d'expertise pour les conditions de champ libre au-dessus d'un plan réfléchissant,1981-05-01,1,['17.140.01'],ISO/TC 43,9599,[4546],[9240],"['en','fr']",25,

## 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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).