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User Guide
ECH001XN161-A4 - 07/2022
16
Chapter 3
Introduction and test setup
Audiometry
is the basic hearing test. This test allows a quick check of the entire sound transmission chain to the
brain in a discriminating manner. The measurement is obtained by emitting a frequency-calibrated sound wave, the power
of which is reduced as long as the patient hears it. The sounds are emitted by an acoustic stimulator in one of the ears,
then in the other.
Pure-tone Audiometry
allows the investigation of hearing thresholds for each ear, in a frequency range from
125𝐻𝑧
à
8𝑘𝐻𝑧
. While
bone conduction
assesses the performance of the inner ear and the auditory nerve,
air conduction
tests
the entire acoustic function from the outer ear to the auditory nerve. The resulting audiogram is interpreted to measure
the degree of hearing loss and the type of hearing loss. Tone audiometry also allows the determination of the discomfort
threshold, or the search for the frequency of possible tinnitus.
3.1
Material
To perform a Pure-tone audiometry, you need the following equipment:
Elements common to the different configurations
OT
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device
Air conduction audiometry
1 audiometry headset or inserts earphones
