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4100
ISO 226:1987
Acoustics -- Normal equal-loudness level contours
This standard has been revised by ISO 226:2003.
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.
Life cycle
A standard is reviewed every 5 years
Revisions / Corrigenda
-
Previously
ISO/R 226:1961
-
Now withdrawn
ISO 226:1987 -
Revised by
ISO 226:2003
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