So, do you hear the soft,
melodious tones in my voice?
Do you know that I’m
sitting in front of you?
Can you tell that I’m a male?
Can you tell that I’m
extremely happy right now?
Well, these are all some features of sound
that you’re detecting without even thinking.
So that’s why right now we’ve
blocked out the screen,
because I want you to just
focus in on that voice.
Just appreciate how intricate and
amazing that whole process is a
and you don’t ever
even think about it.
let’s walk through the ear and we’re going
to look at the structure and function
and how it works.
So we have three broad areas of the
ear that we want to talk about.
The first is outer ear.
So this includes structures
like the auricle, the pinna,
the external auditory canal, the tympanic
membrane, also known as the eardrum.
That’s all the stuff that
you’ll see on the outside.
Quite clear, quite obvious.
The outer ear and some of
the stuff that, you know,
you might kind of
see if you peek in.
It’s stuff that when
you go to the doctor,
they take a peek, that’s
what they’re looking at.
They’re looking at the canal.
They’re looking at the eardrum
or the tympanic membrane.
It’s also where you sometimes want
to put a Q-tip but not too far.
Then we have the middle ear.
This includes the three small
bones that we all hear about,
the three smallest bones
in the human body.
So the ossicles, the ossicles: the
malleus, the incus, the stapes,
so we’ve heard this being termed as the
hammer, the anvil and the stirrup.
And they’re given those names
based on their structure.
So you can’t really see
great in this image,
but you can easily look up an image and
it’ll show you their actual shape.
Not a huge deal for the exam,
but just you should be more
familiar with the actual names.
Then you have the inner ear.
This is stuff that’s called that
because it’s inside your head.
And we have structures like the cochlea
which is the star really of the show
and where a lot of
the action happens.
utricle, and the saccule.
So really, really important to
understand those three broad components.
we’re going to work through some of the
different components that are sort of --
of interests more around the middle and
inner ear because the outer ear is,
not that it’s not important, it’s
just pretty straightforward.
So components of the inner ear are
important for our sense of balance.
So we all know that it happens when
you’re dizzy or something is awry
and you get tipsy and a lot of that is
controlled by the function of the inner ear.
So the round window, which
is found in the cochlea,
it allows fluid to move
within that cochlea.
And then we have something
called the Eustachian tube,
which equalizes the pressure on both
sides of the inner and middle ear.
It’s also where you get that ear-popping
effect when your ears pop.