COMD 3700 exam 3 set 2

MCL

Most Comfortable Level

purpose of MCL test

to determine best level for patient to hear and understand speech

what is MCL in normal hearing

40-55 dB HL

stimulus for finding MCL

cold running speech

bracketing

raising and lowering intensity while you are talking to find MCL. Increase in 5 dB steps and decrease in 10dB steps

how high is your tv?

a good indication of their MCL

what happens above 110dB

hearing can be damaged

UCL

Uncomfortable Loudness Level

purpose of UCL test

to determine point at which patient won't accept any further loudness

stimulus for UCL

cold running speech

other names for UCL

TD: threshold of discomfort
Tolerance Level
LDL: Loudness discomfort Level

what is UCL for nomal hearing

100-110 dB HL, those with sensioneural loss often have a lower UCL

what is DR or RCL

Dynamic Range of Range of Comfortable Loudness:
this is the range of usable hearing

equation for finding DR or RCL

UCL-SRT = DR
for ex: normal hearing 120 dB (UCL)- 20dB (SRT) = 90 dB DR

what can the range be for DR

normal hearing can have a DR of 100 dB or more
hearing loss DR may be 35 dB or less or anywhere in between

CD compared to live orchestra

CD recorded at 35dB so if have DR of 50 can listen but not to live orchestra which is at 70dB bc/ either too soft or too loud depending on where you sit

names for speech recognition testing

speech recognition testing
word recognition testing
word discrimination testing
speech discrimination testing

discrim

term audiologist may use when referring to the word discrimination testing

measurement of speech discrimination

speech recognition score (SRS)
word recognition score (WRS)
speech discrimination score

purpose of speech recognition testing

-to determine ability to discrimate speech
-to aid in diagnose site of disorder
-proper selection of hearing aids
-help make a prognosis for the outcome of treatment

PB word lists

phonetically balanced word list
% of times sound is on list is = to % of time sound occurs in english language
1 syllable words
familiar to average person

CID-W-22

Central Institute for the Deaf (CID) Auditory Test W-22

NU-6

Northwestern University Test No. 6

6 lists of 50 words

CID-W-22

4 lists of 50 words

NU-6

carrier phrase

say the word" speak with natural inflection so when say the test word after carrier phrase your pitch and loudness will be slightly lower

can you repeat the list

not in the same day, use a different list bc/ the patient is not to be familiarized to the list

what is the presentation level for the speech recognition test

40dB SL above the SRT of the patient or if too loud then at their MCL

will the SL or HL be the same for each patient on the speech recognition test

the SL will be the same bc/ it will be 40dB SL above their SRT so since that varies the HL will be different for each patient

how is speech recognition testing recorded

in %'s. Each word on a 50 word list is worth 2%; on a 25 word they are worth 4%.
Important to record the list used and the intensity level as well as the % on the audiogram

Speech Recognition Testing results

92-100% excellent
82-90% good
72-80% fair
52-70% poor
22-50% very poor
0-20% extremely poor

normal speech compared to background noise

8dB louder than background noise

speech scores for cochlear disorders

normally consistent with the degree of hearing loss:
the greater the loss, the poorer the WRS

speech scores for retrocochlear disorders

the score is usually much poorer than expected based on the degree of hearing loss.

Performance Intensity Function

if WRS goes down when intensity is increased above a certain level then sign of possible retrocochlear disorder

peak PB max

the point on the ordinate where the WRS is highest

rollover effect

where the WRS begins to go down as intensity is increased

what ultimately do the speech test do

verify the results of the Pure Tone tests and help determine the extent of patients loss, loudness tolerance, and speech recognition as well as determine where the problem lies and determine what type of treatment