Acoustics. Reference zero for the calibration of audiometric equipment - Reference equivalent threshold sound pressure levels for pure tones and insert earphones Ingestion-build-137917 BS IEC 62531 on property

BS IEC 62531 on property specification language is useful for:

BS 5935 also provides dimensional characteristics of the plain cores

to influence systems analysis

ISO 20251 mentions that the tests need to be performed under the standard atmosphere as mentioned

This standard also provides recommendations for exchange of information between the supplier

Acoustics. Reference zero for the calibration of audiometric equipment - Reference equivalent threshold sound pressure levels for pure tones and insert earphones Ingestion-build-137917 BS IEC 62531 on property1 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