Acoustics. Reference zero for the calibration of audiometric equipment - Reference equivalent threshold sound pressure levels for pure tones and circumaural earphones Ingestion-build-63114 Who is BS 3841-2 -

Who is BS 3841-2 - Determination of smoke emission from manufactured solid fuels for domestic use for

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Acoustics. Reference zero for the calibration of audiometric equipment - Reference equivalent threshold sound pressure levels for pure tones and circumaural earphones Ingestion-build-63114 Who is BS 3841-2 -1 Scope This part of ISO 389 specifies reference equivalent threshold sound pressure levels (RETSPLs) for pure tones in the frequency range from 125 Hz to 8 kHz, applicable to the calibration of air conduction audiometers equipped with a particular model of circumaural earphones (SENNHEISER HDA 200). NOTE Some notes and references on the derivation and the test conditions used to determine the recommended reference levels are given in Annex A and the