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About This Item
Full Description
All current amendments available at time of purchase are included with the purchase of this document.
Document History
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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
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BS EN ISO 389-3:1999
Acoustics. Reference zero for the calibration of audiometric equipment-Reference equivalent threshold force levels for pure tones and bone vibrators- Historical Version
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BS 6950:1988
Specification for a standard reference zero for the calibration of pure tone bone conduction audiometers- Historical Version
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BS 2497-4:1972
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Specification for a reference zero for the calibration of pure-tone audiometers-Normal threshold of hearing for pure tones by bone conduction- Historical Version