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Parts of the ear from outside to in!
- Oracle (or pinna)
- Ear canal w/ hair cells
- Ear Drum
- Hammer/Anvil/Stirrup
- Eustachian tube
- Oval window
- Cochlea
- Semicircular canals
- Auditory nerve
- Brain
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Oracle (or Pinna):
catch the sound
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Ear canal w/ hair cells
send sound in side with the hair cells catching crap
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Ear drum:
vibrates for 3 bones
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Hammer/Anvil/Stirrup (ossicles):
all 3 vibrate and send sound through oval window
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Eustachian tube:
3 tubes that connect the ears, throat, and nose
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Cochlea:
record sound by passing it through cochlear hairs
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Semicircular canals:
fluid filled, help with balance
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What to not call them:
Hearing impaired, deaf and dumb, deaf mute, handicapped, or disabled
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Frequency ranges:
Low:
High:
- Low: up to 125Hz
- High: above 125Hz
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Audism:
repression/opression of deaf people thinking that they're not as good as hearing people
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What is the Hard of Hearing dilemma?
"am I hearing or deaf?"
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Hard of Hearing:
mild to moderate loss of hearing; sometimes don't want anything to do with the deaf world
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Air conduction test:
uses earphones and symbols; tests one ear at a time
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Symbols in Air conduction test:
- •RED= RIGHT
- •BLUE/BLACK= LEFT
- •symbol O = RIGHT
- •symbol X = LEFT
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Audiogram:
paper that records your hearing
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Bone conduction test:
headband on head vibrates to see if you can hear through the bone; test for sensory neural loss (deafness in the inner ear)
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Symbols for Bone Conduction Test:
- •symbol > = LEFT
- •symbol < = RIGHT
- •squiggly line down = can't hear at all
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Baer test:
bone conduction test on baby while they're asleep and doctors look at brain waves
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Crude test:
what parents use when they suspect their child is deaf
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Range of Slightly Hard of Hearing:
25-40dB
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Range of Mild Hard of Hearing:
41-54dB
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Range of Moderately Severe Hard of Hearing:
55-69dB
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Range of Severely Deaf:
70-90dB
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Range of Profoundly Deaf:
+90dB
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How did they become deaf?
- -by birth (deaf genes carried in parents)
- -premature birth
- -Rubella (German measles epidemic 1960s)
- -having a high fever
- -spinal meningitis (affects different parts of body; epidemic 1950s)
- -certain medicines
- -a lot of unknown causes of deafness
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How many deaf kids have hearing parents?
90% of deaf people have HEARING PARENTS; only 10% of deaf people have deaf parents
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Why can some deaf people talk?
- -late deafened
- -born hearing but became deaf by disease
- -extensive speech therapy and they're very smart
- -some deaf people have never heard speech and try to mimic it
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Mainstream school:
deaf classes on a hearing campus; if reading level is high enough they can take hearing classes with interpreters. Can try out for sports, but usually try out with hearing kids
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Day school:
all deaf school, but all the kids live at home
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Residential school (institute):
all deaf school, kids can chose to live at school or live and home and be bussed (if live close enough); has infirmaries and counselors
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