# ISO 3745:1977 — Withdrawn and superseded ISO standards

For ISO 3745:1977, item title is Acoustics — Determination of sound power levels of noise sources — Precision methods for anechoic and semi-anechoic rooms; status code is 9599; successor is ISO 3745:2003; withdrawn / published date is 1977-05-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 3745:1977 _(verified: appears in the quote below)_
- **Item title:** Acoustics — Determination of sound power levels of noise sources — Precision methods for anechoic and semi-anechoic rooms _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 3745:2003
- **Withdrawn / published date:** 1977-05-01 _(verified: appears in the quote below)_

## What the source says

> 9241,IS,,ISO 3745:1977,Acoustics — Determination of sound power levels of noise sources — Precision methods for anechoic and semi-anechoic rooms,Acoustique — Détermination des niveaux de puissance acoustique émis par les sources de bruit — Méthodes de laboratoire pour les salles anéchoïque et semi-anéchoïque,1977-05-01,1,['17.140.01'],ISO/TC 43/SC 1,9599,[4546],[21750],"['en','fr']",21,"<p>Specifies two laboratory methods. Gives requirements for the test room as well as the source location, operating conditions and instrumentation. Specifies techniques for obtaining an estimate of the surface sound pressure level from which the weighted sound power level of the source and the sound power lev

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).