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Types of Hearing Aids There are two major classes of hearing aids, those we call "conventional" and those technologically advanced models that are, for convenience, referred to as "computerized" but are more accurately described as “digital.” In general, conventional hearing aids are less expensive than the high tech ones. The more expensive digital aids are programmable (customizable in many technically sophisticated ways) to amplify speech much as a normal ear does. Also, they are designed to provide continuously comfortable listening regardless of the loudness (or softness) of the voice (or music) you are trying to hear. Most of these models have no need for a volume control.
Regardless of type, all hearing aids
consist of these components:
a microphone to pick up sound.
an amplifier to increase its
loudness.
a method for regulating loudness.
m
most conventional models have volume control wheels
m
most digital models have automatic volume control
an easily replaced battery
to power for the amplifier.
a miniature loud speaker
(called the "receiver') to present
a tubing (internal or
external) to carry the amplified/clarified
a custom ear mold or
custom molded plastic case which
In
the Canal hearing aids are built into a custom shell
housing that fits into the ear canal.
In
the Ear hearing aids are also built into a custom shell
housing but because they occupy both the hollow portion of the
ear and the ear canal they are larger than the ITC type.
The
typical Behind the Ear hearing aid is an inch or
so long and is tucked behind the ear. It conducts amplified
sound into the ear canal via a flexible plastic tubing attached
to an ear mold specially molded for your ear.
Completely In the Canal hearing aids offer both cosmetic
and acoustic advantages over other types in that they are very
small and so can be positioned deep in the ear canal thus
enabling them to deliver amplified sound closer to the ear drum
(an acoustic advantage) than the other types.
“
Toward Better Understanding”
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