SHS 311 Exam 2 Questions and
Correct Answers (100% Correct
Verified Answers)
What are the two parts of the Auditory System?
The Central Auditory Nervous System (CANS)
Peripheral Auditory System
Which auditory system is "the brain part"?
The Central Auditory Nervous System (CANS)
Which auditory system is "the ear part"?
Peripheral Auditory System
What is included in The Central Auditory Nervous System
(CANS) ?
Cortex, thalamus, midbrain, & brainstem
What is included in the Peripheral Auditory System?
Cochlea (Outer Ear, MiddleEar, Inner Ear, and Auditory Nerve)
What 3 major tasks does the Peripheral Auditory System
accomplish?
1.) Increases sensitivity to sound
2.) Provides neural code for sounds so CANS can analyze code
3.) Provides compressed neural representation of large dynamic
range of sound levels
What type of frequencies does the peripheral auditory
system naturally boost?
Particularly frequencies important for speech
Primary function of the outer ear
directs sound to middle ear
localization of sound
amplifies or attenuates sound (filter)
protection (curves/narrowing & cerumen)
Outer ear frequency range & decibles boost:
, 2000 Hz-4000 Hz
20 dB
Primary function of middle ear
Matches impedance difference between air and fluid of inner ear
to effectively deliver sound vibration to inner ear
Middle ear frequency range & decible boost:
800 Hz-1000 Hz
30 dB
How does the middle ear protect the inner ear?
Helps it from being overdriven by excessively strong vibrations
(protects from loud noises)
Primary function of inner ear
Transduction of sound vibration into the neural code
Auditory transduction
ear converts sound waves in the air into electrical impulses, which
can be interpreted by the brain
Primary function of auditory nerve
transmits neural code of sound to the brainstem
Anatomy of the outer ear
Pinna (auricle) & external auditory meatus (EMA-outer ear canal)
Function of the pinna
Provides cues for sound location
Head related transfer function (HRTF)
sound from a specific location is altered by a person's head,
torso, and ears before it reaches the eardrums
Input signal = every frequency at same amplitude
White noise
What happens if the sound input is closer to the right ear?
Right ear is closer to sound source = output of frequencies is
higher
Sound/head shadow for left ear = output of frequencies is lower
What happens if sound source is directly in front or above
you?
Correct Answers (100% Correct
Verified Answers)
What are the two parts of the Auditory System?
The Central Auditory Nervous System (CANS)
Peripheral Auditory System
Which auditory system is "the brain part"?
The Central Auditory Nervous System (CANS)
Which auditory system is "the ear part"?
Peripheral Auditory System
What is included in The Central Auditory Nervous System
(CANS) ?
Cortex, thalamus, midbrain, & brainstem
What is included in the Peripheral Auditory System?
Cochlea (Outer Ear, MiddleEar, Inner Ear, and Auditory Nerve)
What 3 major tasks does the Peripheral Auditory System
accomplish?
1.) Increases sensitivity to sound
2.) Provides neural code for sounds so CANS can analyze code
3.) Provides compressed neural representation of large dynamic
range of sound levels
What type of frequencies does the peripheral auditory
system naturally boost?
Particularly frequencies important for speech
Primary function of the outer ear
directs sound to middle ear
localization of sound
amplifies or attenuates sound (filter)
protection (curves/narrowing & cerumen)
Outer ear frequency range & decibles boost:
, 2000 Hz-4000 Hz
20 dB
Primary function of middle ear
Matches impedance difference between air and fluid of inner ear
to effectively deliver sound vibration to inner ear
Middle ear frequency range & decible boost:
800 Hz-1000 Hz
30 dB
How does the middle ear protect the inner ear?
Helps it from being overdriven by excessively strong vibrations
(protects from loud noises)
Primary function of inner ear
Transduction of sound vibration into the neural code
Auditory transduction
ear converts sound waves in the air into electrical impulses, which
can be interpreted by the brain
Primary function of auditory nerve
transmits neural code of sound to the brainstem
Anatomy of the outer ear
Pinna (auricle) & external auditory meatus (EMA-outer ear canal)
Function of the pinna
Provides cues for sound location
Head related transfer function (HRTF)
sound from a specific location is altered by a person's head,
torso, and ears before it reaches the eardrums
Input signal = every frequency at same amplitude
White noise
What happens if the sound input is closer to the right ear?
Right ear is closer to sound source = output of frequencies is
higher
Sound/head shadow for left ear = output of frequencies is lower
What happens if sound source is directly in front or above
you?
