Troubleshooting - MDHearingAid Pro User Manual

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.
• Confirm that the Hearing Aid is
working properly by removing the
Aid and covering the end of the
Tubing or attached Ear Dome
with your finger. The whistling
should stop.
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• Try reinserting the Ear Dome
into ear so it fits better. If that
doesn't work, try a different
size 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.
• Check for any cracks in the Tubing
or Base. Cracks may become
another entrance for sound to
enter and cause feedback.
• Lower the volume if it is set too
high, and try using a non-vented
Closed Ear Dome.
For optimal performance, the Hearing Aid Ear Domes and
Tubing should be replaced every 3-6 months. Replacements
can be ordered at: www.mdhearingaid.com/accessories.
• Clean any wax from the Tubing
or Ear Dome that may be
interfering with the Hearing Aid.
(See enclosed Cleaning Tool.)
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