BS EN ISO 389-2:1994 : Implementation of ISO 389-2:1994 Acoustics — Reference zero for the calibration of audiometric equipment — Part 2. Reference equivalent threshold sound pressure levels for pure tones and insert earphones
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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.
BS EN ISO 389-2:1994 : Implementation of ISO 389-2:1994 Acoustics — Reference zero for the calibration of audiometric equipment — Part 2. Reference equivalent threshold sound pressure levels for pure tones and insert earphones