# ISO 389:1991 — Withdrawn and superseded ISO standards

For ISO 389:1991, item title is Acoustics — Standard reference zero for the calibration of pure-tone air conduction audiometers; status code is 9599; successor is ISO 389-1:1998; withdrawn / published date is 1991-03-07, recorded from its source on 2026-08-05.

- **Identifier:** ISO 389:1991 _(verified: appears in the quote below)_
- **Item title:** Acoustics — Standard reference zero for the calibration of pure-tone air conduction audiometers _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 389-1:1998
- **Withdrawn / published date:** 1991-03-07 _(verified: appears in the quote below)_

## What the source says

> 4375,IS,,ISO 389:1991,Acoustics — Standard reference zero for the calibration of pure-tone air conduction audiometers,Acoustique — Zéro normal de référence pour l'étalonnage des audiomètres à sons purs en conduction aérienne,1991-03-07,3,['13.140'],ISO/TC 43,9599,[4374],[30443],"['en','fr']",6,

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).