Acoustics. Reference zero for the calibration of audiometric equipment - Reference threshold of hearing for test signals of short duration Ingestion-build-78747 — mechanical sector scanner

— mechanical sector scanner

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

was based on an abrasion machine specified

not all commands are applicable to every amplifier

The functions of program entry

Acoustics. Reference zero for the calibration of audiometric equipment - Reference threshold of hearing for test signals of short duration Ingestion-build-78747 — mechanical sector scanner1 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.