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Troubleshooting
1. Instrument makes a whistling sound.
• Whistling (feedback) occurs when
amplified sound returns to the
microphone and is re-amplified.
Most hearing aids (even ones
costing thousands of dollars)
will whistle when not inserted
properly in the ear canal.
• Lower the volume if it is set too
high, and try using a non-vented
Closed Ear Dome.
• Clean any wax from the AIR
Tubing that may be interfering
with the Hearing Aid.
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• If feedback is still an issue try
using the Traditional Tubing
System.
• Confirm that the Hearing Aid
is working properly by removing
the aid and covering the end of
the AIR Tubing or attached
Ear Dome with your finger.
The whistling should stop.
• Try reinserting the Ear Dome
into ear so it fits better. If that
doesn't work, try a different
sized Ear Dome.
• Occasionally, whistling may
occur when you have a blockage
of wax in the ear canal from a
cold or any condition that causes
sound to be reflected from the
ear canal. In these cases, the
fit may be fine and the whistling
will disappear when the condition
is corrected.
For optimal performance, the Hearing Aid Ear Domes and AIR
Tubing should be replaced every 3-6 months. Replacements
can be ordered at: www.mdhearingaid.com/accessories.
• Check for cracks in the AIR
Tubing or Base. Cracks may
become another entrance
for sound to enter and cause
feedback.
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