ISO 226:2003

Acoustics — Normal equal-loudness-level contours

Publication date:   Aug 21, 2003

95.99 Withdrawal of Standard   Mar 29, 2023

General information

95.99 Withdrawal of Standard   Mar 29, 2023

ISO

ISO/TC 43 Acoustics

International Standard

13.140   Noise with respect to human beings

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Scope

This International Standard specifies combinations of sound pressure levels and frequencies of pure continuous tones which are perceived as equally loud by human listeners. The specifications are based on the following conditions: the sound field in the absence of the listener consists of a free progressive plane wave; the source of sound is directly in front of the listener; the sound signals are pure tones; the sound pressure level is measured at the position where the centre of the listener's head would be, but in the absence of the listener; listening is binaural; the listeners are otologically normal persons in the age range from 18 years to 25 years inclusive.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 226:1987

NOW

WITHDRAWN
ISO 226:2003
95.99 Withdrawal of Standard
Mar 29, 2023

REVISED BY

ABANDON
ISO/NP 226

ABANDON
ISO/DIS 226

PUBLISHED
ISO 226:2023