CHAPTER SIX
Test troubleshooting
60
Test troubleshooting
5. Touch each electrode to identify which is causing the problem, try:
• holding the skin around the electrode taut
• maintaining light pressure on the electrode
• gently stroking the baby’s head
• repositioning the baby’s head
6.2.3 High environment electrical noise
Audible noise in the room as well as interference from other electrical
equipment may trigger an artefact reject signal.
Solutions:
1. Check that all electrode and cable connections are secure.
2. Switch o any non-essential equipment in the room.
3. Do not use mobile (cellular) phones when operating the equipment.
4. Separate the electrode cables from the probe cable if intertwined.
5. Move to a quieter location if possible.
6.2.4 No response in ear with known normal hearing
Check electrode montage (placement). Using an incorrect montage can
result in very small responses, or responses that have a low template
correlation.
Check probe t. A probe that has very poor t to the ear can result in very
low stimulus levels and therefore a small or absent response.
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