Selecting a Hearing Aid
What you should
know!
Hearing loss has many causes. It may be present at birth, caused
by injury, infection or exposure to very loud noise. Some hearing
loss is a natural part of the aging process. Hearing aids can
often reduce the effects of hearing loss. Hearing aids can make
soft sounds louder and can make listening easier.
Although hearing aids can benefit many people, its important
to keep in mind that no hearing aid can restore normal hearing.
The expected benefits depend on many factors, including the degree
of hearing loss.
There are many decisions to be made when selecting hearing aids.
Making this important choice should be a team effort involving
you and your audiologist. The Acoustic Hearing Center provides
a comprehensive approach that will help you make the best decision.
Initial Evaluations
First, a hearing evaluation should be completed by a certified
audiologist. This evaluation is performed in a sound booth using
specialized equipment, and will show the amount and type of hearing
loss. The audiologist will also check how well you hear and understand
speech. An examination by a physician should be completed to rule
out certain medical conditions, such as ear infections, which
might be correctable. Unless a waiver is signed, the U.S. Food
and Drug Administration (FDA) requires that a physician perform
an ear examination within six months before purchase of hearing
aids. Your family physician may refer you to an ear, nose and
throat specialist (Otolaryngology) or to an Otologist for this evaluation.
After these two evaluations are completed, impressions of your
ears will be made, a simple process that takes about 15 minutes.
A hearing aid evaluation then can be performed to help determine
which of the many types of hearing aid circuitry will be best
for you.
Factors To Consider When Purchasing Hearing Aids
Your listening needs, abilities and concerns are the most important
considerations when choosing hearing aids. Some other choices
for you to consider are:
One or Two Hearing Aids
Two hearing aids are usually recommended. There are some exceptions
to this, and your audiologist will discuss the advantages of using
two hearing aids versus one.
Hearing Aid Style
The four main styles of hearing aids are Completely Into
the Canal (CIC), In-The-Canal (ITC), In-The-Ear (ITE),
Behind-The-Ear (BTE). The style choice depends on many factors. The
final decision will be made based on the degree of your hearing
loss, your listening needs and your personal preference.
Technical Considerations
The technical characteristics of hearing aids are very important.
These characteristics include the amount of gain or amplification
provided at each frequency, the loudest sound that the hearing
aid can produce, and specialized signal processing technology.
Selection is based on the individual needs of the patient.
Some hearing aids come with adjustable controls, raised volume
control wheels, tamper-resistant battery compartments and options
that make them easy to use with other listening devices.
Testing Your Hearing Aids
Hearing aids can be evaluated in several ways. For example,
the hearing aid itself can be tested with special equipment to
insure that it is operating properly. It is also important to
evaluate the performance of the hearing aids while they are being
worn, and this can be done in two ways. One way to check a hearing
aid's performance while it is being worn is to evaluate a person's
ability to hear tones and speech through the hearing aids. These
responses are then compared to responses without hearing aids.
This procedure is called functional gain testing.
In another technique, known as probe-microphone testing, a small
tube is placed into the ear canal along with the hearing aid or
earmold. Then, sound amplified by the hearing aid can be measured
in the ear canal. This technique is a precise way of predicting
how the hearing aid will improve listening to speech. It also
allows measurement of the loudest sound level the hearing aid
produces in the ear canal.
Follow-up Appointments
A thirty-day trial period with new hearing aids is recommended
by the FDA. During this time the hearing aid should be used in
every-day situations to determine if any adjustments or changes
are necessary. Your audiologist or hearing aid dispenser should
be consulted if you have any concerns or problems. After you have
been fitted with your hearing aids, it is important to have your
hearing re-evaluated on a regular basis. Your hearing aids' performance
should be tested as well. These evaluations should be done annually
or more often if recommended by the audiologist or doctor.
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