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BS EN ISO 389-7:2005

BS EN ISO 389-7:2005. Acoustics. Reference zero for the calibration of audiometric equipment. Reference threshold of hearing under free-field and diffuse-field listening conditions
Published Date: 23/01/2006 Status: Current, Under review

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BS EN ISO 389-7:1998

BS EN ISO 389-7:1998. Acoustics. Reference zero for the calibration of audiometric equipment. Reference threshold of hearing under free-field and diffuse-field listening conditions
Published Date: 15/04/1998 Status: Revised, Withdrawn

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BS 2497-7:1988, ISO 389:1985/ADD 2:1986

BS 2497-7:1988, ISO 389:1985/ADD 2:1986. Standard reference zero for the calibration of pure tone air conduction audiometers. Specification for a standard reference zero at frequencies intermediate between those given in Parts 5 and 6 of BS 2497
Published Date: 29/02/1988 Status: Revised, Withdrawn

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