International Standard
ISO 389-4:1994
Acoustics — Reference zero for the calibration of audiometric equipment — Part 4: Reference levels for narrow-band masking noise
Reference number
ISO 389-4:1994
ISO 389-4:1994
Edición 1
1994-10
1994-10
© ISO 2024
International Standard
p
ISO 389-4:1994
22496
No disponible en español
Publicado
(Edición 1, 1994)
Esta norma se revisó y confirmó por última vez en 2021.
Por lo tanto, esta versión es la actual.
Resumen
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.
Ciclo de vida
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Anteriormente
RetiradaISO 8798:1987
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Ahora
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