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jacwill
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why is speech aud important
because the hearing loss that is inferred from a pure tone audio can not depict, beyond the grossest generalization, the degree of disability in speech communication caused by a hearing loss
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most complaints from individuals
- in children, difficulty hearing
- in adults, understanding
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MCL
LDL
SDS
- MOST COMFORTABLE
- LOUDNESS DISCOMFORT
- SPEECH DISCRIMINATION SCORE-ABILITY TO DISCRIMINATE SOUNDS OF SPEECH
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problems inherent with speech testing
- misinterpretation of patients response
- talkback systems
- need for picutre testing (the WIPI)
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sat/sdt
- speech awareness thresh
- simple I can hear speech, by raise of hand or the like
- speech detection thresh = percentage of words that not saying back
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srt
- speech recognition thresh
- say it back to examiner
- point at which 50% of words can be correctly identified hot dog, birthday etc.
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will srt or sdt/sat be louder
srt because more intense
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range of mcl
about 100-110 db
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ldl or ucl
level of speech that is uncomfortably loud
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dynamic range
- arithmetic range btw comfortable loudness and uncomfortable loudness
- usually is around 100 db or greater for normal hearing individuals
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speech recognition testing/ speech discrimination testing
- ability to understand
- can be improved by
- decreasing distance from listener to speaker
- incre intensity of speakers voice
- presented at 30-40 db above srt
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types of speech materials used when testing
- nonsense syllables
- digits
- monosyllabic words
- sentences-open and closed
- most commonly used=phonetically balanced word lists
- means that lists contain all the phonetic elements of connected english discourse in their normal proportion to one another
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cnc
- consonant/neucleus/consonant
- developed because no true balance of list that are phonetically categorized
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test for speech recognition
- picture id test pit
- for adults who are not able to produce verbal resoponse
- wipi
- nu chips
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srs
quick sin
spin
- speech recognition sentences-cause speech patterns change over time and provide more realistic test. 10 sentences of 7 words, carries no meaning. patient point to correct sentence
- qsin-6 sentences presented with 4 talker babble, identify 5 key words
- spin-speech perception in noise made up of 50 sentences and last word is test item, voice babble in background
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audibility index
- ai
- estimation of persons speech recognition based on amount of speech signal that is audible
- %
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