Published
Specifies levels supplementary to those specified in ISO 389:1991 (to be re-issued as ISO 389-1). Values given are applicable to insert earphones of type Etymotic Research ER-3A, coupled to the human ear by ear inserts of type ER-3-14.
PUBLISHED
ISO 389-2:1994
90.93
Standard confirmed
Apr 9, 2020
ABANDON
ISO/PWI 389-2
Acoustics - Reference zero for the calibration of audiometric equipment - Part 2: Reference equivalent threshold sound pressure levels for pure tones and insert earphones (ISO 389-2:1994)
90.92 Standard to be revised