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Glavni meni

ISO 389-4:1994

Acoustics — Reference zero for the calibration of audiometric equipment — Part 4: Reference levels for narrow-band masking noise
22. 9. 1994.

Опште информације

90.93     29. 1. 2021.

ISO

ISO/TC 43

Međunarodni standard

13.140  

francuski   engleski  

Kupovina

Objavljen

Jezik na kome želite da primite dokument.

Apstrakt

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.

Životni ciklus

PRETHODNO

POVUČEN
ISO 8798:1987

TRENUTNO

OBJAVLJEN
ISO 389-4:1994
90.93 Odluka o potvrđivanju standarda
29. 1. 2021.

Nacionalna preuzimanja

Akustika – Referentna nula za kalibraciju audiometrijske opreme – Deo 4: Referentni nivoi za uskopojasnu maskirajuću buku

90.93   Odluka o potvrđivanju standarda