NF ISO 226
Acoustics - Normal equal-loudness-level contours
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.
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.
- Avant-proposiv
- Introductionv
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1 Domaine d'application1
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2 Références normatives1
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3 Termes et définitions1
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4 Formules pour la détermination des lignes isosoniques normales2
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4.1 Obtention du niveau de pression acoustique à partir du niveau de sonie2
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4.2 Obtention du niveau de sonie à partir du niveau de pression acoustique3
- Annexe A (normative) Lignes isosoniques normales pour des sons purs dans des conditions d'écoute en champ libre5
- Annexe B (normative) Tableaux des lignes isosoniques normales pour des sons purs dans des conditions d'écoute en champ libre6
- Annexe C (informative) Notes sur l'obtention des lignes isosoniques normales9
- Bibliographie17
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