

A completed history form will determine 1) conditions at birth or during the
adolescent years that could have an impact on hearing 2)the patient's exposure to
workplace noise 3) medications taken for various pathologies 4) past surgeries and 5)
family traits and hereditary anomalies.
During this period, the audiologist will also try to determine the overall needs of the
patient including their own perception of the problem.
Following a thorough history, the audiologist will examine the OUTER ear with an otoscope
or video otoscope. The audiologist can observe any damage caused by Q tip use, trauma or
chronic infection. The audiologist can also observe the condition of the tympanic
membrane.
The first step in the hearing test battery is tympanometry. This is a painless procedure
that measures the condition of the MIDDLE ear. This test will tell the audiologist 1) if
the eardrum is moving freely, 2)if the bones in the MIDDLE ear are intact and functional,
and 3) ensure that the air pressure in the MIDDLE ear cleft is equal to the atmospheric
pressure. The audiologist can also perform an acoustic reflex, a voluntary response of the
hearing mechanism which serves to protect the ear from damage by loud noise exposure.
Once the integrity of the MIDDLE ear has been determined, the audiologist will perform a
pure tone test, the patient's response to very soft tones simulating notes on a piano.
This test will help the audiologist to map the responses to the hearing mechanism,
particularly the sensory mechanism of the INNER ear. During this test, speech stimulus
will also be used, either by the tester's voice or by tape recorded lists. This test will
help the audiologist to determine the ability of the hearing mechanism to integrate and
understand the speech signal. Occasionally, the audiologist will find it necessary to
introduce background noise into the test procedure. This will give the audiologist a
better understanding of the patient's auditory nerve system to discriminate voices in the
presence of this background noise.