Acoustics. Reference zero for the calibration of audiometric equipment - Reference threshold of hearing for test signals of short duration Ingestion-build-78747 BS EN 61347-2-10+A1 must be

BS EN 61347-2-10+A1 must be used in conjunction with BS EN 61347-1

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This part of ISO 15087 gives requirements

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Acoustics. Reference zero for the calibration of audiometric equipment - Reference threshold of hearing for test signals of short duration Ingestion-build-78747 BS EN 61347-2-10+A1 must be1 Scope This part of ISO 389 specifies reference hearing threshold levels for tests signals of short duration applicable to the calibration of audiometric equipment where such signals are used. NOTE 1 Some notes on different parameters and their effects on threshold levels are given in Annex A. NOTE 2 Preferred test conditions for determining hearing thresholds for standardization are specified in ISO 389 9.