ISO 226:1987

For ISO 226:1987, item title is Acoustics — Normal equal-loudness level contours; status code is 9599; successor is ISO 226:2003 | ISO/WD 226; withdrawn / published date is 1987-05-07, recorded from its source on 2026-08-05.

Identifier: ISO 226:1987 verified
Item title: Acoustics — Normal equal-loudness level contours verified
Status code: 9599 verified
Successor: ISO 226:2003 | ISO/WD 226
Withdrawn / published date: 1987-05-07 verified

Sourceisopublicstorageprod.blob.core.windows.net

Verified2026-08-05

Review by2027-02-01

DatasetWithdrawn and superseded ISO standards

What the source says

4100,IS,,ISO 226:1987,Acoustics — Normal equal-loudness level contours,Acoustique — Lignes isosoniques normales,1987-05-07,1,['13.140'],ISO/TC 43,9599,[4099],"[34222,30173]","['en','fr']",8,<p>Specifies the relations existing between the sound pressure levels and frequencies of pure sinusoidal continuous tones in several conditions. These relations are expressed as curves and represent a fundamental property of the human auditory system.</p>

— isopublicstorageprod.blob.core.windows.net, retrieved 2026-08-05

Source

isopublicstorageprod.blob.core.windows.nethttps://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified against source: 2026-08-05. Due for re-check by 2027-02-01. This page as Markdown · OKF bundle · full dataset as JSON.