AS 60118.9-2007

1 - AS 60118.9-2007 Hearing aids Part 9: Methods of measurement of characteristics of hearing aids with bone vibrator output
4 - PREFACE
5 - CONTENTS
6 - INTRODUCTION
7 - 1 Scope
7 - 2 Object
7 - 3 General
8 - 4 Explanation of terms
9 - 5 Test equipment
9 - 5.1 Equipment for the measurement of the output force level
10 - 5.2 Equipment for automatic sweep frequency recording
10 - 6 Test conditions
10 - 6.1 General
10 - 6.2 Test space
10 - 6.3 Locating the hearing aid in the sound field
11 - 6.4 Applying the bone vibrator to the mechanical coupler
11 - 7 Measurements
11 - 7.1 Output force level frequency response curve for an input SPL of 90 dB (OFL90) curve)
11 - 7.2 Full-on force level frequency response
12 - 7.3 Basic force level frequency response
12 - 7.4 Effect of tone control position on the basic force level frequency response
12 - 7.5 Battery current
13 - 7.6 Non-linear distortion
13 - 7.7 Internal noise from the hearing aid
13 - 7.8 Characteristics of hearing aids with induction pick-up coil input
13 - 8 Frequency response recording chart
14 - Annex A Examples of test assemblies

Adopts IEC 60118-9 to specify methods of measurement of the characteristics of hearing aids using bone vibrator output.

First published as AS 60118.9-2007.