# ISO 140-9:1985 — Withdrawn and superseded ISO standards

For ISO 140-9:1985, item title is Acoustics — Measurements of sound insulation in buildings and of building elements — Part 9: Laboratory measurement of room-to-room airborne sound insulation of a suspended ceiling with a plenum above it; status code is 9599; successor is ISO 10848-2:2006; withdrawn / published date is 1985-02-14, recorded from its source on 2026-08-05.

- **Identifier:** ISO 140-9:1985 _(verified: appears in the quote below)_
- **Item title:** Acoustics — Measurements of sound insulation in buildings and of building elements — Part 9: Laboratory measurement of room-to-room airborne sound insulation of a suspended ceiling with a plenum above it _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 10848-2:2006
- **Withdrawn / published date:** 1985-02-14 _(verified: appears in the quote below)_

## What the source says

> 3965,IS,,ISO 140-9:1985,Acoustics — Measurements of sound insulation in buildings and of building elements — Part 9: Laboratory measurement of room-to-room airborne sound insulation of a suspended ceiling with a plenum above it,Acoustique — Mesurage de l'isolation acoustique des immeubles et des éléments de construction — Partie 9: Mesurage en laboratoire de l'isolation au bruit aérien de pièce à pièce par un plafond suspendu surmonté d'un vide d'air,1985-02-14,1,"['91.060.30','91.120.20']",ISO/TC 43/SC 2,9599,,[35004],"['en','fr']",6,<p>Specifies a method for measuring a quantity called the suspended ceiling normalized level difference when the sound transmitted by paths other than the requ

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).