Active standard | Published: 22/09/1994

ISO 389-4:1994

Acoustics — Reference zero for the calibration of audiometric equipment — Part 4: Reference levels for narrow-band masking noise
(Acoustique — Zéro de référence pour l´étalonnage d´équipements audiométriques — Partie 4: Niveaux de référence pour bruit de masque en bande étroite)

Available languages: English, French

Available design: electronic design (pdf), Print design

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Detail information

Designation: ISO 389-4:1994

Publication date: 22/09/1994

Pages: 4

Country: International technical standard

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Anotation

Description / Abstract: Specifies reference levels for narrow-band masking noise presented by air conduction from an earphone in pure-tone audiometry. The data are given in terms of levels to be added to the reference equivalent threshold sound pressure levels for the corresponding pure-tone frequencies. Data are given for noise bandwidths of one-third and one-half octaves.

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