ISO-226 › Historical Revision Information
Acoustics - Normal Equal-Loudness-Level Contours
The following bibliographic material is provided to assist you with your purchasing decision:
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.
To find similar documents by classification:
This document comes with our free Notification Service, good for the life of the document.
This document is available in either Paper or PDF format.
Document Number
ISO 226:1987
Revision Level
1ST EDITION
Status
Superseded
Publication Date
May 1, 1987
Committee Number
ISO/TC 43