Acoustics. Reference zero for the calibration of audiometric equipment - Reference equivalent threshold sound pressure levels for pure tones and insert earphones Ingestion-build-47182 general purpose (code B)

general purpose (code B)

Common forms of eyewear include glasses (also called eyeglasses or spectacles)

The testing of pure FAME (which is in the scope of EN ISO 5165) has been excluded from the scope for the time being as there seem to be sample-specific biases for such product

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

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

Acoustics. Reference zero for the calibration of audiometric equipment - Reference equivalent threshold sound pressure levels for pure tones and insert earphones Ingestion-build-47182 general purpose (code B)1 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