ISO 389-4:1994

Acoustics — Reference zero for the calibration of audiometric equipment — Part 4: Reference levels for narrow-band masking noise

NORMA vydaná dňa 22.9.1994

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The information about the standard:

Designation standards: ISO 389-4:1994
Publication date standards: 22.9.1994
The number of pages: 4
Approximate weight : 12 g (0.03 lbs)
Country: International technical standard
Kategória: Technické normy ISO

Annotation of standard text ISO 389-4:1994 :

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.