# ISO 389-3:1994 — Withdrawn and superseded ISO standards

For ISO 389-3:1994, item title is Acoustics — Reference zero for the calibration of audiometric equipment — Part 3: Reference equivalent threshold force levels for pure tones and bone vibrators; status code is 9599; successor is ISO 389-3:2016; withdrawn / published date is 1994-09-22, recorded from its source on 2026-08-05.

- **Identifier:** ISO 389-3:1994 _(verified: appears in the quote below)_
- **Item title:** Acoustics — Reference zero for the calibration of audiometric equipment — Part 3: Reference equivalent threshold force levels for pure tones and bone vibrators _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 389-3:2016
- **Withdrawn / published date:** 1994-09-22 _(verified: appears in the quote below)_

## What the source says

> 22495,IS,,ISO 389-3:1994,Acoustics — Reference zero for the calibration of audiometric equipment — Part 3: Reference equivalent threshold force levels for pure tones and bone vibrators,Acoustique — Zéro de référence pour l'étalonnage d'équipements audiométriques — Partie 3: Niveaux de référence équivalents de force liminaire pour les vibrateurs à sons purs et les ossivibrateurs,1994-09-22,1,['13.140'],ISO/TC 43,9599,[14349],[59759],"['en','fr']",10,"<p>Specifies the following data applicable to the calibration of bone vibrators for pure-tone bone-conduction audiometry: reference equivalent threshold force levels (RETFL), corresponding to the threshold of hearing of young otologically normal

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).