audio05-speech

matchmoaningΤεχνίτη Νοημοσύνη και Ρομποτική

17 Νοε 2013 (πριν από 3 χρόνια και 10 μήνες)

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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


intensity


frequency


suprasegmentals

dynamics of speech


intensity


whisper
-

20 dB HL


normal conversational speech
-

50 to 60 dB


loud speech
-

70 dB


shouting
-

90 dB

dynamics of speech


frequency


about 250 to 8000 Hz


most important speech sounds
-

500 through 6000
Hz

dynamics of speech


dynamics of speech

dynamics of speech


suprasegmentals are those aspects of speech not
attributable to specific speech sounds


these include ...


stress


duration


pitch


juncture

dynamics of speech


input transducer


VU meter and amplifier


attenuator (hearing level dial)


output transducer

equipment


normally sound treated booth
-

mandatory for mlv


recommend CDs whenever possible

test environment


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


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


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


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


example of nu
-
6 word list


50 monosyllabic, phonemically balanced words


stimuli


base, mess, cause, mop, good, luck, walk,
youth, etc.

speech audiometry


example of the word intelligibility by picture
identification (WIPI).


25 monosyllabic words
-

appropriate for children 4 to 6.

speech audiometry


description


ratio or percentage


high frequencies (e.g., 2kHz) more heavily weighted.


correlates with hearing handicap


how is it determined?

audibility index


summary