Download Operating Instructions MA 52

Operating Instructions MA 52
Table of Contents
Page
1 Introduction ............................................................................................. 4
2 Description ............................................................................................... 5
3 Getting started ......................................................................................... 7
3.1 Unpacking your instrument.................................................................... 7
3.2 Preparing the MA 52 for use .................................................................. 8
3.3 Getting familiar with the MA 52 ............................................................ 9
3.3.1 Using the keyboard of the MA 52.................................................. 10
3.3.2 The display of the MA 52 .............................................................. 11
4 Pure tone audiometry ............................................................................. 13
4.1 Air Conduction (AC) Testing ................................................................ 13
4.2 Uncomfortable Hearing Level (UCL) Testing .......................................... 14
4.3 Bone Conduction (BC) Testing ............................................................. 15
4.4 Masking of the opposite ear .............................................................. 15
4.4.1 Crossover: .................................................................................... 16
4.4.2 Masking theory: ............................................................................ 16
4.4.3 Manual masking: .......................................................................... 16
4.4.4 Automatic masking: ...................................................................... 17
4.5 Diagnostic tests ................................................................................... 18
4.5.1 Suprathreshold tests...................................................................... 18
4.5.2 The Stenger Test ........................................................................... 21
4.5.3 The Threshold Decay (Carhart) Test................................................ 21
5 Speech audiometry ................................................................................. 23
5.1 Connecting the speech source ............................................................. 23
5.1.1 Connecting a CD or tape-player .................................................... 23
5.1.2 Connection of Microphone ........................................................... 23
5.2 Speech calibration ............................................................................... 24
5.2.1 Calibration of the CD or tape with speech test material.................. 24
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