BS EN ISO 389-4:2004
Acoustics — Reference zero for the calibration ofaudiometric equipment — Part 8 : Reference equivalent threshold sound pressure levels for pure tones and circumaural earphones
- Standard No.
- BS EN ISO 389-4:2004
- Release Date
- 1970
- Published By
- /
- Latest
- BS EN ISO 389-4:2004
BS EN ISO 389-4:2004 history
- 1970 BS EN ISO 389-4:2004 Acoustics — Reference zero for the calibration ofaudiometric equipment — Part 8 : Reference equivalent threshold sound pressure levels for pure tones and circumaural earphones
- 1995 BS EN ISO 389-4:1999 Acoustics - Reference zero for the calibration of audiometric equipment - Reference levels for narrow-band masking noise
- 1995 BS EN ISO 389-4:1995 Acoustics - Reference zero for the calibration of audiometric equipment - Reference levels for narrow-band masking noise
- 0000 BS 7113:1989
