Acoustics. Reference zero for the calibration of audiometric equipment - Reference equivalent threshold sound pressure levels for pure tones and insert earphones Ingestion-build-47182 PD CEN/TR 15339-4 should be

PD CEN/TR 15339-4 should be used in conjunction with CEN/TR 15339-1

The required levels are to be found in local regulations or non-conflicting standards

Procedure A is applicable to diesel fuels that may contain fatty acid methyl esters (FAME) up to 30 % (V/V) (as in [1]

NOTE Guidance on complete acoustic enclosures is given in ISO 15667

This part of ISO 14837 does not deal with vibration arising from the construction and maintenance of the rail system

Acoustics. Reference zero for the calibration of audiometric equipment - Reference equivalent threshold sound pressure levels for pure tones and insert earphones Ingestion-build-47182 PD CEN/TR 15339-4 should be1 Scope This part of ISO 389 specifies reference equivalent threshold sound pressure levels (RETSPL) for the calibration of pure tone audiometers supplementary to those specified in ISO 389: 19911). Values given in this part of ISO 389 are applicable to insert earphones of a pattern specified in clause 4. NOTE 1 For information, a note on the derivation of the reference values and the origin of the data input is given in annex A, and a bibliography is