MPAS 523 Ear
Disorders
1. What are the travel through the ear?
three parts of
the ear?
2. The number of
wave peaks that
pass a given
point in a
certain amount
of time
-Dictates tone
3. Height of a
wave
-Dictates volume
4. What does
shorter
wavelength
mean in terms
of frequen- cy
and pitch?
5. Sound
intensity
measured in
deci- bels (db)
6. What decibel can
cause hearing
loss?
7. How does a
sound wave
1/
17
, MPAS 523 Ear
Disorders
-Outer cy
-Middle
-
I
n
Amplitude
n
e
Shorter wavelength = higher frequency = higher pitch
r
F Acoustics
r
e Above 85
-Hearing damage with accumulated exposure over time
q
u -Sound wave becomes a pressure wave as it strikes the tympanic
membrane and is transmitted to the ossicles
e -Ossicles act as a single lever (malleus, incus, stapes)
-Faceplate of stapes on oval window pushes/pulls fluid inside cochlea
n -Pressure waves thru fluid become a nerve signal
8. Organ of Corti
1/
17
, MPAS 523 Ear
Disorders
Receptor organ
for hearing
- Lies on
basilar
membrane
- Contains hair
cells
- Cilia on hair
cells embed in
tectorial -Low frequency sensing hair cells are at apex (interior) of cochlea
membrane
9. What is the loca-
tion of low and high - High frequency sensing hair cells are at base (periphery) of
cochlea
frequency sensing
hair cells in the
cochlea?
10. Sensory hearing loss with age
- Damage of
12. the high frequen- cy sensing hair cells at the
base of the cochlea
- Lose high frequen- cy sounds first
What muscles con- tract in order to avoid
damage to the inner ear when exposed to
loud sounds?
11.
2/
17
, MPAS 523 Ear
Disorders
Pr ssicle system more rigid
es -Weakens fluid wave to
b decrease volume
ya
cu
si
s
St
ap
ed
iu
s
an
d
te
ns
or
ty
m
pa
ni
-M
a
k
e
s
o
2/
17
Disorders
1. What are the travel through the ear?
three parts of
the ear?
2. The number of
wave peaks that
pass a given
point in a
certain amount
of time
-Dictates tone
3. Height of a
wave
-Dictates volume
4. What does
shorter
wavelength
mean in terms
of frequen- cy
and pitch?
5. Sound
intensity
measured in
deci- bels (db)
6. What decibel can
cause hearing
loss?
7. How does a
sound wave
1/
17
, MPAS 523 Ear
Disorders
-Outer cy
-Middle
-
I
n
Amplitude
n
e
Shorter wavelength = higher frequency = higher pitch
r
F Acoustics
r
e Above 85
-Hearing damage with accumulated exposure over time
q
u -Sound wave becomes a pressure wave as it strikes the tympanic
membrane and is transmitted to the ossicles
e -Ossicles act as a single lever (malleus, incus, stapes)
-Faceplate of stapes on oval window pushes/pulls fluid inside cochlea
n -Pressure waves thru fluid become a nerve signal
8. Organ of Corti
1/
17
, MPAS 523 Ear
Disorders
Receptor organ
for hearing
- Lies on
basilar
membrane
- Contains hair
cells
- Cilia on hair
cells embed in
tectorial -Low frequency sensing hair cells are at apex (interior) of cochlea
membrane
9. What is the loca-
tion of low and high - High frequency sensing hair cells are at base (periphery) of
cochlea
frequency sensing
hair cells in the
cochlea?
10. Sensory hearing loss with age
- Damage of
12. the high frequen- cy sensing hair cells at the
base of the cochlea
- Lose high frequen- cy sounds first
What muscles con- tract in order to avoid
damage to the inner ear when exposed to
loud sounds?
11.
2/
17
, MPAS 523 Ear
Disorders
Pr ssicle system more rigid
es -Weakens fluid wave to
b decrease volume
ya
cu
si
s
St
ap
ed
iu
s
an
d
te
ns
or
ty
m
pa
ni
-M
a
k
e
s
o
2/
17
