CGSC379 Study Guide - Fall 2018, Comprehensive Midterm Notes - Wax, Vestibular System, The Middle Tv Series
12 Oct 2018
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CGSC379
MIDTERM EXAM
STUDY GUIDE
Fall 2018
Audiology (CGSC379) Class Notes
August 31, 2016
1. Best email: [email protected]
2. Must schedule a 2-hour observation with a local audiologist.
a. )f you do this at home over thanksgiving break, then you need the AuDs
license number
b. Must have the observation guide (you can find this on Sakai)
3. Think about the ASHA conference this year in Philly – there is a student fee
1. Audiology
a. Relatively new field in the health sciences
2. Audiologist vs. Hearing Aid Dispenser
a. Hearing Aid Dispenser only do a hearing test with the purpose of selling a
hearing aid
September 7, 2016
1. What is sound?
a. Movement of molecules through an (elastic) medium
2. Physics of Sound
a. Rarefaction and condensation
i. Between two points of rarefaction is the cycle (or period) of the sound
ii. See figure 2.7-2.8 in textbook
3. Hertz/Frequency/Pitch
a. The ear is most sensitive to 125-8000Hz
4. Audiograms
a. 120dB is like standing on a tarmac next to a jet airplane
b. Page 20 in textbook
c. Amplitude of the wave on an audiogram is what we perceive as loudness
i. What a hearing aid does is going to take an existing sound wave and
make it stronger and louder before it enters the ear so the damaged
ear has access to it
ii. Hearing aids dont make the ear better, but it makes the sound louder
for the person to hear
d. Inverse Graphs
i. Goes from 125 to 8000
ii. Goes in octaves that are doubling on the top of the graph x-axis)
iii. dB (loudness intensity) (y-axis)
e. Symmetrical vs. Assymetrical
i. Unilateral Hearing Loss: one-sided hearing loss, profound hearing
loss in one year and normal hearing in the other
f. Masked vs. Unmasked
i. Masking: putting just enough noise in to keep the better ear busy
while you test the poorer ear
g. Hearing Loss
find more resources at oneclass.com
find more resources at oneclass.com
i. Conductive: outer or middle ear, purpose of middle ear is to funnel
sound to the inner ear/cochlea
1. Neural component of the ear works really well
ii. Sensorineural: refers to the cochlea, permanent hearing loss
iii. Mixed: mix of both conductive and sensorineural hearing loss
iv. Unilateral/Bilateral: one sided/both sides
v. Symmetrical/Assymetrical: even on both sides/uneven on both sides
vi. Vibrotactile: not really hearing at all, but so loud and so low of
frequency that you can actually feel it
vii. Auditory Neuropathy:
h. Ear Structure:
i. Audiology Symbols
i. A legend is like your cheat sheet
ii. Memorize the symbols! They will be on your test!
iii. 0 = Right, zero is always the right ear, when masking change to
triangle
iv. X = Left, when masking change to square
1. These two signs are universal for air conduction (when you
test with the headset)
v. An arrow attached to a symbol always means no response
vi. Soundfield Speakers: if youre working with a patient who dont like
the headset on, you can use this and it doesnt give the best
information but it gives something
j. Degrees of Hearing Loss
i. Different criteria for children vs. adults
ii. The criteria are different and stricter for children because they are
learning how to talk
iii. Most people who wear hearing aids who wear them to help the hear
speech are usually called Hard of Hearing
iv. A lot of people with hearing loss do not like to be called Hearing
Impaired
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Hearing aid dispenser: hearing aid dispenser only do a hearing test with the purpose of selling a hearing aid. Reverse slope: poor hearing in the lower frequencies but better in the higher frequencies; this is a very rare form of hearing loss: high frequency: tricky! In slide example 39, the yellow is perilymph and blue is. Endolympth note that they both travel without the ear. September 21, 2016: chapter 7: auditory pathologies/disorders, congenital and acquired abnormalities, outer ear pathologies (fig. Jervell-lange-neilson: often fatal, in hearing people we call it (cid:498)long q. T syndrome(cid:499) it(cid:495)s usually a massive heart attack. The sound then travels across the malleus, incus, and stapes (the ossicles). The stapes sits up against the oval window to the inner ear, fluid in the inner ear moves and the movement of the fluid is what causes us to hear. Acoustic immittance what you admit in, allow through. Immittance: cm3 or mmho: units of ear canal pressure: dapa.
