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  • BS EN ISO 389-3:2016

    Current The latest, up-to-date edition.

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

    Available format(s):  Hardcopy, PDF

    Language(s):  English

    Published date:  29-02-2016

    Publisher:  British Standards Institution

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    This part of ISO389 specifies the following data applicable to the calibration of bone vibrators for pure-tone bone-conduction audiometry: reference equivalent threshold vibratory force levels (RETVFL), corresponding to the threshold of hearing of young otologically normal persons by bone-conduction audiometry; essential characteristics of the bone vibrator and the method of coupling to the test subject, and to the mechanical coupler; essential characteristics of the masking noise and the baseline masking noise level applied to the ear not under test. Guidance on the practical application of this part of ISO389 in the calibration of audiometers is given in AnnexB. RETVFL is the vibratory force level transmitted to a mechanical coupler of specified characteristics by a vibrator when applied to the mechanical coupler under stated conditions of test and when energized at the voltage level corresponding to the normal threshold of hearing for location on the mastoid prominence. NOTE 1 Values for the differences in reference equivalent threshold vibratory force levels between location on the forehead and mastoid are included for information in AnnexC. NOTE 2 Recommended procedures for carrying out bone-conduction audiometry are specified in ISO8253-1.

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    Committee EH/1/1
    Development Note Renumbers and supersedes BS ISO 389-3. 1999 Version incorporates amendment 10483 to BS ISO 389-3. Supersedes BS 6950(1988) and 84/54041 DC. (10/2005) Supersedes 14/30279048 DC. (03/2016)
    Document Type Standard
    Publisher British Standards Institution
    Status Current
    Supersedes

    Standards Referencing This Book - (Show below) - (Hide below)

    IEC 60318-6:2007 Electroacoustics - Simulators of human head and ear - Part 6: Mechanical coupler for the measurement on bone vibrators
    ISO 389-4:1994 Acoustics Reference zero for the calibration of audiometric equipment Part 4: Reference levels for narrow-band masking noise
    ANSI S3.13 : 1987 MECHANICAL COUPLER FOR MEASUREMENT OF BONE VIBRATORS
    ISO 4869-1:1990 Acoustics Hearing protectors Part 1: Subjective method for the measurement of sound attenuation
    ISO 389-8:2004 Acoustics — Reference zero for the calibration of audiometric equipment — Part 8: Reference equivalent threshold sound pressure levels for pure tones and circumaural earphones
    ISO 389-1:1998 Acoustics Reference zero for the calibration of audiometric equipment Part 1: Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones
    ISO 8253-1:2010 Acoustics Audiometric test methods Part 1: Pure-tone air and bone conduction audiometry
    IEC 61260-1:2014 Electroacoustics - Octave-band and fractional-octave-band filters - Part 1: Specifications
    ISO 389-2:1994 Acoustics Reference zero for the calibration of audiometric equipment Part 2: Reference equivalent threshold sound pressure levels for pure tones and insert earphones
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