NF S30-007-4*NF EN ISO 389-4:1999
Acoustics. Reference zero for the calibration of audiometric equipment. Part 4 : reference levels for narrow-band masking noise.

Standard No.

NF S30-007-4*NF EN ISO 389-4:1999

Release Date

1999

Published By

Association Francaise de Normalisation

Latest

NF S30-007-4*NF EN ISO 389-4:1999

NF S30-007-4*NF EN ISO 389-4:1999 history

• 1999 NF S30-007-4*NF EN ISO 389-4:1999 Acoustics. Reference zero for the calibration of audiometric equipment. Part 4 : reference levels for narrow-band masking noise.