otometrics Aurical Hit, Reference Manual

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Table of Contents
1 Introduction 5
1.1 Intended Use 5
1.2 Typographical conventions 6
1.2.1 Navigating this manual 6
2 AURICAL HIT 7
2.1 Unpacking AURICAL HIT 7
2.2 Installation 7
2.2.1 Connecting AURICAL HIT 7
2.2.2 Initial calibration 7
2.3 The test chamber 7
2.3.1 Reference microphone 9
2.3.2 BTE adapter tube 9
2.3.3 The coupler assembly 9
2.3.4 Battery simulator 11
2.3.5 Cable groove 11
2.3.6 Elevation plate 11
2.3.7 Coupler microphone sockets 12
2.3.8 Sound absorbing foam lining 12
2.3.9 Main loudspeaker 12
2.3.10 Rear loudspeaker 12
2.3.11 The AURICAL HIT lid 12
2.3.12 Telecoils 12
2.3.13 The AURICAL HIT handle 13
2.4 The Accessory Box 14
3 Testing hearing instruments 15
3.1 Calibrating the reference microphone 15
3.2 Positioning the hearing instrument for testing 16
3.2.1 General guidelines for positioning the hearing instrument 16
3.2.2 Using the battery simulator 18
3.2.3 Coupler adapters 19
3.3 Traditional BTE hearing instruments 20
3.3.1 With BTE adapter tube 20
3.4 Thin-tube hearing instruments 21
3.4.1 Using the HA-1 ITE, RIE, thin-tube adapter 21
3.5 ITE hearing instruments 22
3.6 Telecoil testing 24
3.7 Hearing instruments with wireless transmitters (e.g. FM) 24
3.8 Body-worn hearing instruments 26
3.9 Testing the hearing instrument with OTOsuite HIT 26
3.9.1 How to perform a standard test 26
3.9.2 How to test the directional microphone 27
4 HIT FreeStyle testing 29
4.1 Navigating in HIT FreeStyle 29
5 Cleaning, Repair and Calibration 32
5.1 Cleaning 32
5.1.1 Cleaning the device 32
Otometrics - AURICAL HIT 3