AUD 640 NEED TO STUDY Exam Questions And
Answers 100% Correct Latest 2025
What is the priniciple behind OAEs? - ANSWER The active processes of the cochlea
How are OAEs generated? - ANSWER 1. Cochlea receives sound energy
2. While amplifying sound energy, cochlea loses control of a small amount of energy
3. Some sound energy is sent back to ME/EC, which is recorded by the microphone
What do OAEs tell us? - ANSWER Indirect measure of health of the cochlea when the
cochlea is stimulated with sound
Why are OAEs an indirect measure? - ANSWER Not a direct measure because we are not
sticking anything directly into the cochlea (like a probe or electrode)
Important OAE History (Potential Bonus):
Who is this? What is the year?
While playing double stop trills (violin), he heard audible notes that he was not playing.
He assumed the ear "filled in" additional tones not played by violin. - ANSWER Guiseppe
Tartini
1700s
Fun Fact: He had 6 fingers.
Tartini Tones = DPOAEs
,Important OAE History (Potential Bonus):
Who is this? What is the year?
Cochlea has structural units (resonators) that are individually tuned to different
frequencies - ANSWER Hermann von Helmhotlz
1863
Important OAE History (Potential Bonus):
Who is this? What is the year?
Thought traveling wave was one-way and that the cochlea functioned passively
Never would have found OAEs because work was on cadavers; only living people gave
OAEs - ANSWER Georg von Bekesy
1928
Important OAE History (Potential Bonus):
Who is this? What is the year?
Believed cochlea was characterized by active processes - ANSWER Thomas GOld
1948
,"The Big Cheese"
Important OAE History (Potential Bonus):
Who is this? What is the year?
Discovered OAEs - ANSWER David Kemp
1977
Why did Gold believe cochlea was characterized by "active processes"?
(3) - ANSWER -Cochlear fluids are thick and would reduce resonance abilities of inner
ear
-Thus, the cochlea uses active amplification to enhance resonance of inner ear
Who discovered OAEs and what was the year? - ANSWER David Kemp
1977
What did David Kemp's paper in 1978 say? - ANSWER If tones or clicks are put into the
ear, can measure additional sound in the external ear canal (using a microphone)
How did OAEs evolve after this seminal paper? - ANSWER OAEs became more popular
towards the end of the 1990s
What was the earliest clinical application of OAEs? - ANSWER mid-80s
Newborn Hearing Screenings
, Although OAEs are still widely used to screen in infants, what is the major limitation of
using an OAE as a screening tool in infants? - ANSWER It cannot detect auditory
neuropathy spectrum disorder - Best if combined with ABR
By the year 2000, there was plenty of research to support diagnostic value of OAEs.
What is the diagnostic value of OAEs? - ANSWER Assuming that ME function is normal,
OAEs have a unique sensitivity to the damage of OHCs
What are the categories for OAEs? - ANSWER Spontaneous and Evoked
Spontaneous OAEs - ANSWER These OAEs occur in the absence of an external stimuli
and don't have a lot of clinical value
What are the Evoked OAE types? - ANSWER Stimulus Frequency
Transient
Distortion Product
Stimulus Frequency OAEs
(Least studied experimentally and clinically and are not really used clinically) - ANSWER
elicited by continuous pure tone
Transient OAEs - ANSWER elicited by clicks or short-tone bursts
Distortion Product OAEs - ANSWER Elicited by tone pairs
OAEs are a clinically sensitive measure of _________________ - ANSWER cochlear
(OHC) function
Answers 100% Correct Latest 2025
What is the priniciple behind OAEs? - ANSWER The active processes of the cochlea
How are OAEs generated? - ANSWER 1. Cochlea receives sound energy
2. While amplifying sound energy, cochlea loses control of a small amount of energy
3. Some sound energy is sent back to ME/EC, which is recorded by the microphone
What do OAEs tell us? - ANSWER Indirect measure of health of the cochlea when the
cochlea is stimulated with sound
Why are OAEs an indirect measure? - ANSWER Not a direct measure because we are not
sticking anything directly into the cochlea (like a probe or electrode)
Important OAE History (Potential Bonus):
Who is this? What is the year?
While playing double stop trills (violin), he heard audible notes that he was not playing.
He assumed the ear "filled in" additional tones not played by violin. - ANSWER Guiseppe
Tartini
1700s
Fun Fact: He had 6 fingers.
Tartini Tones = DPOAEs
,Important OAE History (Potential Bonus):
Who is this? What is the year?
Cochlea has structural units (resonators) that are individually tuned to different
frequencies - ANSWER Hermann von Helmhotlz
1863
Important OAE History (Potential Bonus):
Who is this? What is the year?
Thought traveling wave was one-way and that the cochlea functioned passively
Never would have found OAEs because work was on cadavers; only living people gave
OAEs - ANSWER Georg von Bekesy
1928
Important OAE History (Potential Bonus):
Who is this? What is the year?
Believed cochlea was characterized by active processes - ANSWER Thomas GOld
1948
,"The Big Cheese"
Important OAE History (Potential Bonus):
Who is this? What is the year?
Discovered OAEs - ANSWER David Kemp
1977
Why did Gold believe cochlea was characterized by "active processes"?
(3) - ANSWER -Cochlear fluids are thick and would reduce resonance abilities of inner
ear
-Thus, the cochlea uses active amplification to enhance resonance of inner ear
Who discovered OAEs and what was the year? - ANSWER David Kemp
1977
What did David Kemp's paper in 1978 say? - ANSWER If tones or clicks are put into the
ear, can measure additional sound in the external ear canal (using a microphone)
How did OAEs evolve after this seminal paper? - ANSWER OAEs became more popular
towards the end of the 1990s
What was the earliest clinical application of OAEs? - ANSWER mid-80s
Newborn Hearing Screenings
, Although OAEs are still widely used to screen in infants, what is the major limitation of
using an OAE as a screening tool in infants? - ANSWER It cannot detect auditory
neuropathy spectrum disorder - Best if combined with ABR
By the year 2000, there was plenty of research to support diagnostic value of OAEs.
What is the diagnostic value of OAEs? - ANSWER Assuming that ME function is normal,
OAEs have a unique sensitivity to the damage of OHCs
What are the categories for OAEs? - ANSWER Spontaneous and Evoked
Spontaneous OAEs - ANSWER These OAEs occur in the absence of an external stimuli
and don't have a lot of clinical value
What are the Evoked OAE types? - ANSWER Stimulus Frequency
Transient
Distortion Product
Stimulus Frequency OAEs
(Least studied experimentally and clinically and are not really used clinically) - ANSWER
elicited by continuous pure tone
Transient OAEs - ANSWER elicited by clicks or short-tone bursts
Distortion Product OAEs - ANSWER Elicited by tone pairs
OAEs are a clinically sensitive measure of _________________ - ANSWER cochlear
(OHC) function
