British & International Standards

BS 3383, ISO 226

Standard Number: BS 3383:1988, ISO 226:1987
Title: Specification for normal equal-loudness level contours for pure tones under free-field listening conditions
Abstract: Specifies, for the condition of equal loudness and certain other stated conditions, relationships between sound pressure levels and frequencies of pure continuous tones. These are expressed by means of a bilinear equation for the preferred frequencies in the one-third octave series from 20 to 12500 Hz. A graphical illustration is included.
Status: Superseded, Withdrawn
Publication Date: 1988/02/29
Confirmed on: 1999/07/15
Cross References: BS 2497:Part 5, BS 2497:Part 6, BS 2497:Part 7, BS 3045, BS 3593, BS 6951, ISO 454,
Withdrawn on: 2003/09/03
Replaced by: BS ISO 226:2003,
Replaces: BS 3383:1961,
International Relationships: ISO 226 Identical
Supersedes Draft: 84/53660 DC
Descriptors: Equal loudness level, Hearing (auditory perception), Audibility, Sound intensity, Audiofrequencies, Auditory threshold, Acoustic measurement, Equations, Acoustic properties and phenomena, Noise (environmental), Volume (sound), Acoustic waves