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Possible cause
The dome is not firmly
attached to hearing aid.
The ear dome fits poorly.
The volume level is too
high.
An object (hand, person,
wall, etc.) is too close to
your hearing aid.
The batteries are drained
due to overuse.
Debris or wax blocks the
dome.
The WonderMax is not
inserted in ear properly.
Ensure that the dome is firmly
attached to the small end of
the hearing aid.
Choose a different dome that
is more appropriate for your
ear. See page 8.
Always open the battery
compartment door when the
WonderMax is not in use.
Normally all microphones
whistle when an object
is too close. Just increase
the distance between your
hearing aid and the object.
Lower the volume levels
until you find one that won't
whistle. See page 17.
Clean your ear. Replace the
dome and earwax guard if
they are clogged or worn. See
page 9.
Adjust the WonderMax. See
page 13.
Possible solution
You hear feedback, squealing, or whistling.
The batteries drain too quicky.
