Exam (elaborations)
EEOB 4550 final Exam 2| questions with 100% Correct Answers ( A Graded)
- Course
- Institution
EEOB 4550 final Exam 2| questions with 100% Correct Answers ( A Graded)
[Show more]
Seller
Follow
Content preview
EEOB 4550 final Exam 2| questionswith 100% Correct Answers ( A
Graded)
how does the cochlea transduce sounds?
(bat sonar) - ANSWER - high frequencies excite the basal part of the basilar membrane -
lower frequencies excite the basilar membrane more towards its apex (distal) end
place code
(bat sonar) - ANSWER information about frequency is given by the place of origin of the
neuron conveying the information
amplitude
(bat sonar) - ANSWER encoded by the rate of firing of neurons that come from the
basilar membrane
- coded using rate code
time of occurrence of sounds is encoded simply by the...
(bat sonar) - ANSWER pattern of neural activity coming from the cochlea, which
mimics the pattern of the sound
bats can only tell the size of the object by producing...
(bat sonar) - ANSWER an FM sound
to tell the relative velocity from Doppler shift of echo
requires (bat sonar) - ANSWER CF components
Azimuth (horizontal direction) is determined by....
,(bat sonar) - ANSWER interaural differences in time of echo arrival and small
differences in sound intensity at particular frequencies
the small differences in frequency receptivity arise because....
(bat sonar) - ANSWER the pinnae (outer ears) point in different directions
pinnae
(bat sonar) - ANSWER - guide the sound to the tympanum
- are not equally receptive to sounds from different directions
elevation (vertical direction) is determined in some bats by....
(bat sonar) - ANSWER - moving their ears and comparing amplitudes of echoes
- some also analyze the interference pattern imposed on echo by reflection(s)
between pinna and tragus as the sound enters the ear canal
quality factor (Q) - ANSWER - if Q is high, the filter is very narrow, meaning it passes
through or fires in response to only those frequencies lying in a very narrow
frequency band
- if Q is low, the filter is less selective, so it passes through or fires in response
to frequencies lying in a wider frequency band
clutter
(bat sonars) - ANSWER echoes coming back from things that the bat isn't all
that interested in
Because M-bats use Doppler-shift compensation and have a hearing system designed
to detect target motion from the doppler shift of the echo... - ANSWER M-bats can
detect motion that does not match the background "motion". Thus, they can pick out
targets moving relative to the background in a cluttered environment
, FM bats have difficulty hunting in clutter, because, although they can detect objects like
leaves or cave walls and can easily avoid them.... - ANSWER -it's hard for them to
detect an insect sitting on a leaf or on a tree trunk
- can't detect change in echo frequency due to insect rather than leaf
echoes are doppler shifted when ... - ANSWER the bat is moving with respect to the
target
if the bat is approaching an object... - ANSWER the doppler shift is upward
(toward higher frequencies)
M-bats have both a ________ frequency and a _________ frequency - ANSWER
resting and frequency
resting frequency - ANSWER at the lower boundary of the CF2 region
reference frequency - ANSWER more in the middle of the CF2 region
if echoes come back above the reference frequency.... - ANSWER the bat lowers the
frequency of its outgoing sound so that echoes return near the reference frequency
DSCF - ANSWER Doppler Shift Constant Frequency
Doppler Shift Constant Frequency (DSCF) - ANSWER - sits in the middle of the
tonotropic map of frequencies
- maps both the frequencies near the CF2 and their amplitudes
the DSCF area seems to be important in the...., because... - ANSWER accuracy and
speed of doppler shift compensation, because a lesion of this area reduced both of
these, but it did not totally eliminate the bat's ability to doppler compensate
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller KenAli. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.24. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67163 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now