AS 1088.3-1987

1 - AS 1088.3-1987 HEARING AIDS - HEARING AID EQUIPMENT NOT ENTIRELY WORN ON THE LISTENER
4 - PREFACE
4 - CONTENTS
5 - 1. Scope
5 - 2. Object
6 - 3. Test equipment
6 - 3.1 General
6 - 3.2 Acoustic requirements for testing microphones
6 - 3.3 Acoustic couplers
6 - 4. Test procedure
6 - 4.1 Normal operating conditions for equipment
7 - 4.2 Basic frequency response
7 - 4.3 Maximum acoustic gain
7 - 4.4 Output attenuator
7 - 4.5 Internal noise
7 - 4.6 Electrical input sensitivity
8 - 4.7 Electrical output
8 - 4.8 Visual monitoring device
8 - 4.9 Non-linear distortion
9 - 5. Relation between transmitting and receiving devices in case of wireless transmission
9 - 6. Power supply
9 - 6.1 Mains supply voltage variation
9 - 6.2 Battery operation
9 - 7. Safety requirements

Describes a method of determining the overall electroacoustic performance of hearing aid equipment not entirely worn on the listener, used in the rehabilitation of persons having impaired hearing. Technically identical with IEC Publication 118-3.

The purpose of this standard is to describe a method of determining the overall electroacoustic performance of hearing aid equipment not entirely worn on the listener, used in the rehabilitation of persons having impaired hearing.