AS 60118.7-2007

1-AS 60118.7-2007 Hearing aids Part 7: Measurement of the performance characteristics of hearing aids for production, supply and delivery quality assurance purposes
4-PREFACE
5-CONTENTS
7-1 Scope
7-2 Normative references
7-3 Terms and definitions
10-4 General conditions
10-4.1 Acoustic test method
10-4.2 Reporting of data
10-5 Nominal characteristics and tolerances
11-6 Test box and test equipment
11-6.1 General
11-6.2 Unwanted stimuli in the test box
11-6.3 Sound source
11-6.4 Acoustic coupler
11-6.5 Measurement system for the measurement of sound pressure level and harmonic distortion in the acoustic coupler
12-7 Test conditions
12-7.1 General
12-7.2 Control of the sound field
14-7.3 Normal operating conditions for a hearing aid
16-8 Measurements, specifications and tolerances
16-8.1 Frequency response curves
16-8.2 Output sound pressure level frequency response curve for an input sound pressure level of 90 dB (OSPL90 frequency response curve)
17-8.3 Full-on acoustic gain response curve
17-8.4 Basic frequency response curve at reference test gain setting
19-8.5 Battery current
19-8.6 Total harmonic distortion
19-8.7 Equivalent input nois
20-8.8 Additional measurements for hearing aids having induction pick-up coil
20-8.9 Additional measurements applying to AGC hearing aids
21-9 Maximum permitted expanded uncertainty of measurements
23-Bibliography