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I'm Arianna Di Stadio.
Today I will present you
the epidemiology
of hearing loss.
Part 1 we'll discuss the
origin of presbycusis.
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As first, let's start
by saying something
about hearing loss.
We know that there are
different types of
hearing loss: the
sensorineural hearing loss,
and the conductive hearing loss.
The differences between
sensorineural hearing loss
and conductive hearing loss
is the origin of them.
In case of conductive
hearing loss,
we refer to the formal
hearing loss in which
the middle ear is
affected by a disease
or there are other
very rare conditions
that can cause this
typical hearing loss.
The conductive hearing loss has
a typical threshold when you
do a pure auditory test.
From this type of
auditory result,
we can define the
conductive hearing loss.
In case of sensorineural
hearing loss we refer to
a condition in which
the hearing loss is
caused by damage
into the inner ear.
Conductive hearing
loss damages into
the middle ear including
the tympanic membrane,
sensorineural hearing
loss, damages into
the inner rear and even
into the cochlear nerve.
These types of hearing loss can
be congenital and acquired.
We say that a hearing loss is
congenital when it has
an hereditary origin.
When the hearing loss is present
at birth, there are also
forms of hearing loss
that can be acquired
during the growth.
In general, these types of
hearing loss are defined as
acquired and we can identify
the origin of this problem.
Regarding the acquired
hearing loss,
we can define two types
of typical hearing loss.
One is the sudden
form that happened
suddenly and then the second
one is the progressive form.
With the term progressive form
we refer to a process that
is slow in the time and it is
the opposite of the sudden.
It happens time by time.
