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  • BSI
    BS ISO 226:2003 Acoustics. Normal equal-loudness-level contours
    Edition: 2003
    $411.69
    / user per year

Description of BS ISO 226:2003 2003

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:

  1. the sound field in the absence of the listener consists of a free progressive plane wave;

  2. the source of sound is directly in front of the listener;

  3. the sound signals are pure tones;

  4. 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;

  5. listening is binaural;

  6. the listeners are otologically normal persons in the age range from 18 years to 25 years inclusive.

The data are given in graphical form in Annex A and in numerical form in Annex B for the preferred frequencies in the one-third-octave series from 20 Hz to 12 500 Hz, inclusive, in accordance with ISO 266.



Standard NumberBS ISO 226:2003
TitleAcoustics. Normal equal-loudness-level contours
StatusWithdrawn
Publication Date2003-09-03
Withdrawn Date2023-04-12
ReplacesBS 3383:1988
Replaced ByBS ISO 226:2023
Identical National Standard OfISO 226:2003
DescriptorsAuditory threshold, Acoustics, Acoustic waves, Sound intensity, Audiofrequencies, Volume (sound), Hearing (auditory perception), Equations, Audibility, Acoustic measurement, Acoustic properties and phenomena, Noise (environmental), Equal loudness level
ICS13.140 Noise with respect to human beings
CommitteeEH/1
ISBN0 580 42548 7
PublisherBSI
Pages28

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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