Mod 9b Flashcards
in edu context, hearing aid, has residual hearing to process linguistic information through audition
hard hearing
people who are deaf are unable to hear sounds at ____ decibels or more
90
people who are hard of hearing are unable to hear sounds ______ 90db
below
in educational context, cant process ling info with/without hearing aid
deaf
when someone is born deaf
congenitally deaf
when someone becomes deaf after birth
ADVENTITIOUSLY DEAF
deafness * occurs at birth or before the dev of speech and language
pre lingual deaf
deafness after language dev, typically 12-24mo difference
post lingual
hearing threshold levels focus on hearing ____, ____ on speech and _____ ability
sensitivity, stress, language
- more than — of kids getting spec ed for hearing come from diverse backgrounds, IN na MANY non English speaking immigrants = deaf
50%,
this part of the ear has the auricle, external auditory canal and the tympanic membrane
outer ear
this part of the ear has OSSICLES(3 little bones)
‣ Malleus
‣ Stapes
‣ Oval Window
middle ear
this part of the ear has the vestibular mechanism, ‣ 3 semi cirle canals (snails) 2 fluid filled cavity, fluid moves when ossicles move and fluid is changed into electrical impulses
accounts for balance too, not only sound , is affected by ear fluid
and the cochlea
inner ear
Establishes hearing at different frequencies (e.g., 250 Hz)
‣ * Usually measure 0 dB to 110 dB
‣ * For each frequency, the audiologist records a measure of degree of hearing
‣ impairment.
‣ each ear tested seperately
◦ PURE TONE AUDIOMETRY
during _____, ‣ use computer to measure OTOACOUSTIC EMISSIONS which indicate how well cochlea is functioning by giving auditory stimulation
‣ this is done when newborn - very important
* follow up needs to be done at 3 and 6mo
* part of well baby visits
* intervention starts at 6 months if hearing impairment
* without follow up not many are identified until school age
screening
‣ tests detection and understanding of speech.
‣ * Speech reception threshold (SRT): the decibel level at which a person can
‣ understand speech
◦ SPEECH AUDIOMETRY
the ____ ___ ____ _____ (sound banana)* helps to see if loss is conductive, sensoryneural or both
* pure tone audio tests can be transferred here to see whats above (cant hear, soft sounds) or below (can hear)
* most concern of speech banana because where most social stuff happens
audiogram of familiar sounds
larger the db, larger the ____
sound
sound is painful at _____ or louder
125dB
the lowest level at which people with normal hearing
can hear
- Audiometric zero
- number of vibrations per unit of time for sound wave* measured in cycles/second or hertz (Hz); 1 Hz = 1 cycle/second
freq/pitch (hz)
- Frequencies: we can hear frequencies from____ _____ Hz; many of
- these audible sounds are outside the speech range
20 – 20,000 Hz
the energy range most important for hearing speech sounds range
* from
500 – 2,000 Hz
◦ low pitch sounds ___, ◦ high pitch sounds______
250-500hz, 1000-5000- most consonant letters stfsh
◦ interference with the transfer of sound along the conductive pathway of the middle or outer ear, ◦ outer ear = not as serious but can cause issues/hearing impairment (______, _______, ______)
conductive loss, atresia, external otitis, tumours
conductive loss in the middle ear includes problems with ____ and ____
ossicles, otitis media (Eustachian tubes)
sensironeural problems are usually in ______ ear. greater than _____ dis = inner ear problem
inner,60
Most inner ear impairments are _____, the ____ ___ gene is the most congenital cause
genetic, connexin 26
most frequent non-genetic cause of deafness in
infants)
Congenital cytomegalovirus (CMV)(Herpes)
the most severely affected area of development in deaf people
- language comprehension and speech development