behavioral assessment

measure an individual's hearing thresholds and determine the degree, type, and configuration of hearing loss

pure tone audiometry

a core hearing test that evaluates how well you can detect, hear, and understand spoken words at different volume levels

speech audiometry

the softest hearing level at which a person can correctly recognize or repeat 50% of two-syllable, equally stressed words (called spondee words, such as "baseball," "hotdog," or "ice cream)

speech reception threshold (SRT)

the percentage of single-syllable words you repeat back correctly during a hearing test when speech is played at a comfortably loud volume

word recognition score (WRS)

equally stressed words

spondee words

hotdog, baseball, ice cream

spondee words

patient must be asleep

measures brainstem

Auditory brainstem response (ABR) testing

pressure in outer ear to make it wiggle

if no movement probably not healthy ear drum

tympanometry

measures cochlea

specifically measures the outer hair cells stretching

otoacoustic emmissions

stapes shutting when noise over 90dB

acoustic reflexes

vibrating whole head not ear specific

better hearing ear responds

uses an oscillator

only inner ear

bone conduction

how we hear regularly

sound coming through outer, middle, and inner

tests outer middle and inner ear

air conduction

represented by x’s and o’s

screener for potential hearing loss

air conduction (AC)

only tells us one ear

brackets

testing which is the better ear

hiding better ear

bone conduction

doubling sound

octave

hearing loss in the outer middle

conductive

go deeper

better signal

er-3c

insert earphones

how we hear regularly

air conduction

comfort, reusable

sound could leak

TDH headphones

insert or headphones

transducer

pathway of sound

transducer —> ear canal (ear specific) —> cochlea (ear specific)

quietest level a person could hear

threshold

hughson - westlake procedure

down 10 up 5

conductive hearing loss would show via

air conduction

only in the inner ear

bone conduction

<

right ear unmasked

[

masked right

>

left ear unmasked

]

masked left ear

cutoff for children (18 years old)

20 dBHL

test says a person doesn’t have a hearing disorder when they do

ex: they think a beep is there when it’s not

screening missed hearing loss

false negative

patient hears beep but don’t raise their hand during audiometry

refer on screening but have normal hearing

false positive

you cannot have a profound hearing loss

outer or middle ear only gives 50-60 dB range

conductive hearing loss

air scores (AC) outside normal range

bone scores within normal limits (don’t align with AC)

limited severity

conductive hearing loss

air scores outside normal range

bone scores align with air scores

align = less than or equal to 10dBHL

no limit severity

sensorineural hearing loss

combination of conductive and sensorineural hearing losses

bone score - air conduction greater dBHL

both outside the normal range

mixed hearing loss