ISO 389-4:1994 (R2021)
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ISO 389-4:1994 (R2021)

Acoustics
Reference zero for the calibration of audiometric equipment

Summary

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.

Notes

90.93 : Norme internationale confirmée

Technical characteristics

Publisher International Organization for Standardization (ISO)
Publication Date 09/22/1994
Confirmation Date 01/29/2021
Edition 1
Page Count 4
EAN ---
ISBN ---
Weight (in grams) ---
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