NP EN ISO 389-4:2000
Acoustics Reference zero for the calibration of audiometric equipment Part 4:Reference levels for narrow-band masking noise(ISO 389-4:1994)

Standard No.

NP EN ISO 389-4:2000

Release Date

2001

Published By

PT-IPQ

Latest

NP EN ISO 389-4:2000

NP EN ISO 389-4:2000 history

• 2001 NP EN ISO 389-4:2000 Acoustics Reference zero for the calibration of audiometric equipment Part 4:Reference levels for narrow-band masking noise(ISO 389-4:1994)