ELECTROACOUSTICS - SIMULATORS OF HUMAN HEAD AND EAR - PART 5: 2 CM[3] COUPLER FOR THE MEASUREMENT OF HEARING AIDS AND EARPHONES COUPLED TO THE EAR BY MEANS OF EAR INSERTS
International Electrotechnical Committee
FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 Construction
4.1 General
4.2 Cavity dimensions
4.3 Calibrated pressure type microphone
4.4 Static pressure equalisation
5 Calibration
5.1 Reference environmental conditions
5.2 Calibration procedure
6 Coupling of earphones and hearing aids to the coupler
6.1 Audiometers with insert earphones
6.2 Hearing aids of the in-the-ear type
6.3 Hearing aids with insert earphone
6.4 Hearing aids of the behind-the-ear type and spectacle
hearing aids
7 Maximum permitted expanded uncertainty of measurements
Bibliography
Defines an acoustic coupler for loading an earphone or hearing aid with a specified acoustic impedance when determining its physical performance characteristics, in the frequency range 125 Hz to 8 kHz.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 29 |
| Supersedes |
|
