SHS 311 EXAM 2A Questions and Answers With Verified Solutions 2025
What function does the Pinna provide? - ✔✔Filters sound so that the spectrum of sound depends on the
location of sound source
What is the approximation frequency range for the peak of the total outer-ear canal resonance? -
✔✔2000-6000 Hz
The Tympanic Membrane moves more in the middle part that is connected to the Manubrium. What is
this phenomenon called? - ✔✔Buckling
The Eustachian tube helps solve what problem? - ✔✔Transmission is ineffective if middle ear cavity is
enclosed and pressure is different on both sides of the Tympanic Membrane
What is NOT a path by which sound can reach the inner ear? - ✔✔Via Eustachian Tube
What major function does the middle-ear reflex perform? - ✔✔Protects the inner ear from over
stimulation
Scala Vestibuli and Scala Tympani are connected through Helicotrema. Where is Helicotrema located in
the cochlear? - ✔✔At the apex
Which structure provides the metabolic energy needed for normal cochlear function? - ✔✔Stria
Vascularis
Why is the cochlear wave called traveling wave? - ✔✔It travels from the base to the apex.
How does Basilar Membrane vibrate in a frequency-specific manner? - ✔✔High frequency sound causes
the maximum vibration at the base, while low frequency sound causes the maximum vibration at the
apex.
, At the characteristic frequency, how does the slope of input-output function change as the input level
increases? - ✔✔Decreases
. At the characteristic frequency, how does the slope of input-output function change as the input level
increases? - ✔✔4000 HZ
What are the 4 peripheral auditory systems? - ✔✔1. Outer (external) Ear
2. Middle Ear
3. Inner Ear
4. Auditory Nerve
What does the Auditory nerve do? - ✔✔Transmits neural code for sound to the brainstem
What does the inner ear do? - ✔✔Transduction of sound vibration into the neural code
What is the outer (external) ear do? - ✔✔-directs sound to the middle ear
-amplifies sound in frequency, depends on specific manna on location pf sound source
What does the middle ear do? - ✔✔-it matches the impedance diff. b/t air and fluids/tissues of the inner
ear
-protection of inner ear and direct stimulation of IE
What does the Pinna do? - ✔✔Provides cues for sound location
What are 2 functions of the Middle ear? - ✔✔1. Effectively deliver sound vibration to inner ear fluids
2. To help prevent inner ear from being overdriven by strong vibrations
What are the 3 Ossicles? What order? - ✔✔1. Malleus
2. Incus
What function does the Pinna provide? - ✔✔Filters sound so that the spectrum of sound depends on the
location of sound source
What is the approximation frequency range for the peak of the total outer-ear canal resonance? -
✔✔2000-6000 Hz
The Tympanic Membrane moves more in the middle part that is connected to the Manubrium. What is
this phenomenon called? - ✔✔Buckling
The Eustachian tube helps solve what problem? - ✔✔Transmission is ineffective if middle ear cavity is
enclosed and pressure is different on both sides of the Tympanic Membrane
What is NOT a path by which sound can reach the inner ear? - ✔✔Via Eustachian Tube
What major function does the middle-ear reflex perform? - ✔✔Protects the inner ear from over
stimulation
Scala Vestibuli and Scala Tympani are connected through Helicotrema. Where is Helicotrema located in
the cochlear? - ✔✔At the apex
Which structure provides the metabolic energy needed for normal cochlear function? - ✔✔Stria
Vascularis
Why is the cochlear wave called traveling wave? - ✔✔It travels from the base to the apex.
How does Basilar Membrane vibrate in a frequency-specific manner? - ✔✔High frequency sound causes
the maximum vibration at the base, while low frequency sound causes the maximum vibration at the
apex.
, At the characteristic frequency, how does the slope of input-output function change as the input level
increases? - ✔✔Decreases
. At the characteristic frequency, how does the slope of input-output function change as the input level
increases? - ✔✔4000 HZ
What are the 4 peripheral auditory systems? - ✔✔1. Outer (external) Ear
2. Middle Ear
3. Inner Ear
4. Auditory Nerve
What does the Auditory nerve do? - ✔✔Transmits neural code for sound to the brainstem
What does the inner ear do? - ✔✔Transduction of sound vibration into the neural code
What is the outer (external) ear do? - ✔✔-directs sound to the middle ear
-amplifies sound in frequency, depends on specific manna on location pf sound source
What does the middle ear do? - ✔✔-it matches the impedance diff. b/t air and fluids/tissues of the inner
ear
-protection of inner ear and direct stimulation of IE
What does the Pinna do? - ✔✔Provides cues for sound location
What are 2 functions of the Middle ear? - ✔✔1. Effectively deliver sound vibration to inner ear fluids
2. To help prevent inner ear from being overdriven by strong vibrations
What are the 3 Ossicles? What order? - ✔✔1. Malleus
2. Incus
