SHS 311 Comprehensive Resource To Help You Ace 2026-
2027 Exams Includes Frequently Tested Questions With
Elaborated 100% Correct Complete Solutions
Guaranteed Pass First Attempt!! Current Update!!
1. What are the five major anatomy parts of the outer ear? - CORRECT ANSWER Pinna
External Auditory Canal
Tympanic Membrane (Ear drum)
Concha
External Auditory Meatus
2. What are the three major anatomy parts of the middle ear? - CORRECT ANSWER 3
Ossicles (malleus, incus, stapes)
2 chambers (Epitympanum and Tympanum)
1 eustachian tube
3. What are the three ossicles? - CORRECT ANSWER Malleus
Incus
Stapes
4. What are the two chambers of the middle ear? - CORRECT ANSWER Epitympanum
Tympanum
5. What are the four parts of the peripheral auditory system? - CORRECT ANSWER Outer
external ear
Middle ear
,Inner ear
Auditory nerve
6. What is the function of the outer external ear? - CORRECT ANSWER Directs sound to the
middle ear; amplifies or attnuates sound in frequency specific manner depending on
relative location of the sound source
7. What is the function of the middle ear in terms of the peripheral auditory system? -
CORRECT ANSWER Matcehs the impedance difference between air and the fluids/tissues
of the inner ear; direct stimulation of the inner ear protection
8. What is the function of the inner ear? - CORRECT ANSWER Transduction of sound
vibration into the neural code
9. What is the function of the auditory nerve? - CORRECT ANSWER Transmits neural code
for sound to the brain stem
10. What does the pinna do? - CORRECT ANSWER Provides cues for sound location
11. HRTF - CORRECT ANSWER Head Related transfer function
12. How are standing waves generated in ear canal; What is the resulted resonance
frequencye? - CORRECT ANSWER A system oscillates at a greater amplitude than its
input at some frequencies
Standing wave= input wave + reflected wave
Resonant frequency= speed of sound/(4*length of tube) = 3500hz
13. What does the middle ear do? - CORRECT ANSWER Compensate for the impedance
difference, so the auditory system can be maximally sensitive
, 14. What are the three problems that the middle ear solves? - CORRECT ANSWER
Impedance mismatch
Round and oval window both stimulated in the same direction
Transmission is ineffective if middle ear is inclosed
15. Solving impedance mismatch in middle ear (three strategies) - CORRECT ANSWER Area
difference: area of manubrium is 17x larger than the footplate of stapes (pressure is 17x
greater at footplate
lever action (small force at malleus, larger at stapes)
buckling effect (TM moves at middle giving 2 forces at manubrium
16. Solving Round and oval window both stimulates in same direction - CORRECT ANSWER
Stapes only connects at oval window
16. Solving middle ear being enclosed - CORRECT ANSWER Eustachian tube
17. What is the function of the eustachian tube? - CORRECT ANSWER Maintains equal
pressure across tympanic membrane
How is inner ear protected from overstimulation - CORRECT ANSWER reflux from longer sounds
is reduced by 30 dB against 80 dB if neural signal is sent back from brain
18. What is the anatomy of the inner ear - CORRECT ANSWER The cochlea and organ of corti
19. What are the three areas of the cochlea and what is the fluid in them? - CORRECT
ANSWER Scala vestibli
scala tympani (both have perilymph)
, Scala media (endolymph
20. Dra the cochlea and label Scala Media, Scala Vestibuli (oval window), scala tympani
(round window), apex, helicoterma, base, auditory nerve, and modiolus - CORRECT
ANSWER
Draw the organ of corti and label Scala vestibuli, scala media, reisner's membrane, stria
vascularis, hensen's cells, teclorial membrane, spiral ligament, claudios cells, outer hair cells,
inner hair cells, basilar membrane/tunnel of corti/ nodes of corti, osseous spiral lamina, spiral
limbus - CORRECT ANSWER
What is a traveling wave? - CORRECT ANSWER Not a standing wave where there is a reflection
sound
there is no reflection so it envelopes
How does traveling wave respond in terms of location of maxium vibrtion? - CORRECT ANSWER
High frequencies vibrate at the base of basilar membrane stronger
low frequencies vibrate at the apex of basilar membrane stronger
How do you measure isosensitivity? what does the graph look like - CORRECT ANSWER
Measuring the sound level neccessary to displace the basilar membrane a fixed amount at one
place as a function of the stimulation sinusoidal frequency
Graph starts high, cuts down, and cuts right back up
How do you measure isointensity? what does the graph look like? - CORRECT ANSWER
measuring the amount of displacement at one place for stimulaiton sinsuidal sounds of a fixed
level but different frequencies
Graph starts middle and gradually goes higher the cuts almost straight down
2027 Exams Includes Frequently Tested Questions With
Elaborated 100% Correct Complete Solutions
Guaranteed Pass First Attempt!! Current Update!!
1. What are the five major anatomy parts of the outer ear? - CORRECT ANSWER Pinna
External Auditory Canal
Tympanic Membrane (Ear drum)
Concha
External Auditory Meatus
2. What are the three major anatomy parts of the middle ear? - CORRECT ANSWER 3
Ossicles (malleus, incus, stapes)
2 chambers (Epitympanum and Tympanum)
1 eustachian tube
3. What are the three ossicles? - CORRECT ANSWER Malleus
Incus
Stapes
4. What are the two chambers of the middle ear? - CORRECT ANSWER Epitympanum
Tympanum
5. What are the four parts of the peripheral auditory system? - CORRECT ANSWER Outer
external ear
Middle ear
,Inner ear
Auditory nerve
6. What is the function of the outer external ear? - CORRECT ANSWER Directs sound to the
middle ear; amplifies or attnuates sound in frequency specific manner depending on
relative location of the sound source
7. What is the function of the middle ear in terms of the peripheral auditory system? -
CORRECT ANSWER Matcehs the impedance difference between air and the fluids/tissues
of the inner ear; direct stimulation of the inner ear protection
8. What is the function of the inner ear? - CORRECT ANSWER Transduction of sound
vibration into the neural code
9. What is the function of the auditory nerve? - CORRECT ANSWER Transmits neural code
for sound to the brain stem
10. What does the pinna do? - CORRECT ANSWER Provides cues for sound location
11. HRTF - CORRECT ANSWER Head Related transfer function
12. How are standing waves generated in ear canal; What is the resulted resonance
frequencye? - CORRECT ANSWER A system oscillates at a greater amplitude than its
input at some frequencies
Standing wave= input wave + reflected wave
Resonant frequency= speed of sound/(4*length of tube) = 3500hz
13. What does the middle ear do? - CORRECT ANSWER Compensate for the impedance
difference, so the auditory system can be maximally sensitive
, 14. What are the three problems that the middle ear solves? - CORRECT ANSWER
Impedance mismatch
Round and oval window both stimulated in the same direction
Transmission is ineffective if middle ear is inclosed
15. Solving impedance mismatch in middle ear (three strategies) - CORRECT ANSWER Area
difference: area of manubrium is 17x larger than the footplate of stapes (pressure is 17x
greater at footplate
lever action (small force at malleus, larger at stapes)
buckling effect (TM moves at middle giving 2 forces at manubrium
16. Solving Round and oval window both stimulates in same direction - CORRECT ANSWER
Stapes only connects at oval window
16. Solving middle ear being enclosed - CORRECT ANSWER Eustachian tube
17. What is the function of the eustachian tube? - CORRECT ANSWER Maintains equal
pressure across tympanic membrane
How is inner ear protected from overstimulation - CORRECT ANSWER reflux from longer sounds
is reduced by 30 dB against 80 dB if neural signal is sent back from brain
18. What is the anatomy of the inner ear - CORRECT ANSWER The cochlea and organ of corti
19. What are the three areas of the cochlea and what is the fluid in them? - CORRECT
ANSWER Scala vestibli
scala tympani (both have perilymph)
, Scala media (endolymph
20. Dra the cochlea and label Scala Media, Scala Vestibuli (oval window), scala tympani
(round window), apex, helicoterma, base, auditory nerve, and modiolus - CORRECT
ANSWER
Draw the organ of corti and label Scala vestibuli, scala media, reisner's membrane, stria
vascularis, hensen's cells, teclorial membrane, spiral ligament, claudios cells, outer hair cells,
inner hair cells, basilar membrane/tunnel of corti/ nodes of corti, osseous spiral lamina, spiral
limbus - CORRECT ANSWER
What is a traveling wave? - CORRECT ANSWER Not a standing wave where there is a reflection
sound
there is no reflection so it envelopes
How does traveling wave respond in terms of location of maxium vibrtion? - CORRECT ANSWER
High frequencies vibrate at the base of basilar membrane stronger
low frequencies vibrate at the apex of basilar membrane stronger
How do you measure isosensitivity? what does the graph look like - CORRECT ANSWER
Measuring the sound level neccessary to displace the basilar membrane a fixed amount at one
place as a function of the stimulation sinusoidal frequency
Graph starts high, cuts down, and cuts right back up
How do you measure isointensity? what does the graph look like? - CORRECT ANSWER
measuring the amount of displacement at one place for stimulaiton sinsuidal sounds of a fixed
level but different frequencies
Graph starts middle and gradually goes higher the cuts almost straight down
