Installation & Operation Manual

ManualsBrandsAearo ManualsAudio EquipmentE-A-R-TONE WiLAT Audiometric Earphone System (WBU)

Wilat_Op_Man_23Oct08.doc CONFIDENTIAL

Aearo Technologies Page 3 of 21 18/07/2007

Table of Contents

1. INTRODUCTION .....................................................................................................................................4

1.1. SYSTEM OVERVIEW ..........................................................................................................................5

1.2. FUNCTION IDENTIFICATION ................................................................................................................5

Table 1.1 WBU user functions and controls ............................................................................5

Table 1.2 WRU user functions and controls ............................................................................6

2. INSTALLATION AND SET UP................................................................................................................8

2.1 Setting the input impedance.......................................................................................................8

2.2 Setting a Link ID...........................................................................................................................9

2.3 Installing the WBU .....................................................................................................................10

2.4 Installing the WRU .....................................................................................................................11

3. CALIBRATION......................................................................................................................................11

3.1 PURE TONE CALIBRATION...............................................................................................................11

Table 3.1 - ANSI S3.6-2004 / ISO 389- 2:1994 Calibration Values..........................................12

3.2 CALIBRATION FOR SPEECH AUDIOMETRY ..........................................................................................13

Table 3.2 ANSI / IEC Maximum Hearing Level values in dB HL by frequency.....................13

4. USING THE WILAT SYSTEM...............................................................................................................13

Table 4.1 Summary of channel mode selection......................................................................14

4.1 PRE-TEST PROCEDURES...................................................................................................................14

Table 4.2 Obtained Interaural Attenuation ..............................................................................15

5. BACKGROUND NOISE REDUCTION..................................................................................................16

Table 5.1 (From: ANSI S3.1-1999)............................................................................................16

6. WRU POWER MANAGEMENT ............................................................................................................17

7. PRECAUTIONS, MAINTENANCE, AND TROUBLESHOOTING ........................................................18

7.1 INTERFERENCE WITH OTHER WIRELESS DEVICES ..............................................................................18

7.2 SEVERE MECHANICAL SHOCK ..........................................................................................................18

7.3 DEVICE END OF LIFE DISPOSAL ........................................................................................................18

7.4 WBU OVERFLOW ALERT.................................................................................................................18

7.5 NO LINK CONDITION .......................................................................................................................18

8. REPLACING THE WRU BATTERY......................................................................................................19

9. SPECIFICATIONS.................................................................................................................................20

10. LIMITED WARRANTY..........................................................................................................................21