# ISO 21727:2004 — Withdrawn and superseded ISO standards

For ISO 21727:2004, item title is Cinematography — Method of measurement of perceived loudness of motion-picture audio material; status code is 9599; successor is ISO 21727:2016; withdrawn / published date is 2004-09-24, recorded from its source on 2026-08-05.

- **Identifier:** ISO 21727:2004 _(verified: appears in the quote below)_
- **Item title:** Cinematography — Method of measurement of perceived loudness of motion-picture audio material _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 21727:2016
- **Withdrawn / published date:** 2004-09-24 _(verified: appears in the quote below)_

## What the source says

> 34671,IS,,ISO 21727:2004,Cinematography — Method of measurement of perceived loudness of motion-picture audio material,Cinématographie — Méthode de mesure de l'intensité sonore percue pour les films cinématographiques,2004-09-24,1,['37.060.99'],ISO/TC 36,9599,,[69744],['en'],6,"<p>ISO 21727:2004 specifies a method of measurement of motion-picture sound that allows assessment of the subjective loudness and annoyance of the sound recording when replayed at the recommended replay level in rooms aligned with the characteristics of ISO 2969. The specified method of measurement assesses the entire duration of the sound recording with suitable channel summation, frequency weighting and time integra

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).