DIN ISO 12124:2002-09

1 Scope
2 Normative references
3 Terms and definitions
4 Limitations
5 Conditions for test environment
  5.1 Environmental conditions
  5.2 Ambient background noise
  5.3 Acoustical properties
  5.4 Sound field characteristics
6 Preparation of subject
  6.1 Otoscopic examination
  6.2 Position of subject
  6.3 Instructions to subject
7 Measurement procedure
  7.1 Equipment
  7.2 Calibration
  7.3 Equalization methods
  7.4 Test signal
  7.5 Location of the subject
  7.6 Location of the tester
  7.7 Choice of field reference point
  7.8 Choice of measurement point
  7.9 Location and coupling of the hearing aid
  7.10 Real-ear unaided response (REUR) curve
  7.11 Real-ear unaided gain (REUG) curve
  7.12 Real-ear occluded response (REOR) curve
  7.13 Real-ear occluded gain (REOG) curve
  7.14 Real-ear aided response (REAR) curve
  7.15 Real-ear aided gain (REAG) curve
  7.16 Real-ear insertion gain (REIG) curve
8 Data to be recorded
Annex
A Positioning the probe microphone sound inlet at the
  measurement point
Bibliography

Specifies procedures and requirements for measuring the real-ear acoustical characteristics of hearing aids.