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Published byDouglas Andrews Modified over 9 years ago
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dynamics of speech the diagnostic audiometer test environment patient’s and clinician’s role speech-threshold testing most comfortable loudness and uncomfortable loudness speech-recognition testing audibility index speech audiometry
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intensity frequency suprasegmentals dynamics of speech
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intensity whisper - 20 dB HL normal conversational speech - 50 to 60 dB loud speech - 70 dB shouting - 90 dB dynamics of speech
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frequency about 250 to 8000 Hz most important speech sounds - 500 through 6000 Hz dynamics of speech
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suprasegmentals are those aspects of speech not attributable to specific speech sounds these include... stress duration pitch juncture dynamics of speech
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input transducer VU meter and amplifier attenuator (hearing level dial) output transducer equipment
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normally sound treated booth - mandatory for mlv recommend CDs whenever possible test environment
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patient must understand the speech stimuli open set - repeat words/phrases or write it down closed set - multiple choice check-off or picture pointing clinician must make sure that stimuli is presented properly patient’s and clinician’s role
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speech awareness (aka speech detection) threshold speech-recognition threshold (SRT) - lowest intensity where 50% of spondees correctly identified purpose of SRT stimuli - spondees procedures speech thresholds
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most comfortable loudness level (MCL) found about midway between SRT and UCL uncomfortable loudness level normally between 85 and 105 dB (even for those w/ sensorineural hearing loss) MCL & UCL
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purpose stimuli monosyllabic word lists - W-22, NU-6, high frequency lists, etc. syllables and sentences - nonsense syllables, SPIN, CID everyday sentences, etc. pictures - WIPI, NU-CHIPS, etc. speech-recognition testing
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example of nu-6 word list 50 monosyllabic, phonemically balanced words stimuli base, mess, cause, mop, good, luck, walk, youth, etc. speech audiometry
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example of the word intelligibility by picture identification (WIPI). 25 monosyllabic words - appropriate for children 4 to 6. speech audiometry
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description ratio or percentage high frequencies (e.g., 2kHz) more heavily weighted. correlates with hearing handicap how is it determined? audibility index
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summary
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