AmpliVox 270+ - 1. INTRODUCTION; 1.2. INTENDED APPLICATIONS

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D-0126050 rev 1 - 270+ Operating Manual
5.3.3. Insert Masker 41
5.3.4. Insert Earphones 41
5.3.5. Mains adapter maintenance 42
5.4. ACCESSORIES/REPLACEMENT PARTS 42
5.5. REPAIR 42
5.6. WARRANTY 42
5.7. CALIBRATION AND RETURN OF THE INSTRUMENT 43
6. TECHNICAL SPECIFICATIONS 44
6.1. STANDARD AND REGULATORY 44
6.2. GENERAL 44
6.3. TONE AUDIOMETRY 45
6.4. SPEECH TESTING 46
6.5. MAXIMUM HEARING LEVELS PROVIDED BY EACH FREQUENCY 46
6.6. EARPHONE SOUND ATTENUATION CHARACTERISTICS 46
7. EMC GUIDANCE & MANUFACTURER’S DECLARATION 47
8. APPENDIX A - FREE FIELD CALIBRATION PROCEDURE 52
8.1. GENERAL 52
8.2. ASSURANCE OF CALIBRATION 52
8.3. EXTERNAL LOUDSPEAKER 52
8.4. CALIBRATION SET-UP 52
8.5. FREEFIELD SPEECH CALIBRATION 53
8.5.1. General 53
8.5.2. Calibrating the speech channel: Equalisation (Optional) 53
8.5.3. Level Setting 53
8.5.4. Calibrating the Competing Noise Channel 54
8.6. FREEFIELD WARBLE TONES CALIBRATION 54
8.6.1. Entering Free Field Calibration Mode 54
8.6.2. Calibration Procedure 54
8.6.3. Calibrating the Competing Noise Channel 55
8.7. FREEFIELD LIVE SPEECH CALIBRATION 55
9. APPENDIX A – USE WITH NON-MEDICAL ELECTRICAL EQUIPMENT 56