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Cross References:
IEC 225:1966
IEC 645-1:1992
ISO 389-4:1994
ISO 8253-1:1989 EN ISO 389:1995
EN ISO 389-2:1996
ISO 389:1991
ISO 389-2:1994
IEC 373
 

Document History

  1. BS EN ISO 389-3:2016


    Acoustics. Reference zero for the calibration of audiometric equipment-Reference equivalent threshold vibratory force levels for pure tones and bone vibrators

    • Most Recent
  2. BS EN ISO 389-3:1999

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    Acoustics. Reference zero for the calibration of audiometric equipment-Reference equivalent threshold force levels for pure tones and bone vibrators

    • Historical Version
  3. BS 6950:1988


    Specification for a standard reference zero for the calibration of pure tone bone conduction audiometers

    • Historical Version
  4. BS 2497-4:1972


    Specification for a reference zero for the calibration of pure-tone audiometers-Normal threshold of hearing for pure tones by bone conduction

    • Historical Version