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22 Cards in this Set
- Front
- Back
Responsibilities and Job Function |
Evaluations for adults and children Fitting hearing aids and FM devices Cochlear Implant mapping Neonatal Hearing screens Hearing Loss prevention Inter operative monitoring balance testing and therapy educational and university setting OSHA consultant/industry |
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Types of Hearing Loss |
1.) Hearing sensitivity- a reduction in the sensitivity of the auditory mechanism so that sounds need to be louder than normal for listener to perceive. 2.) Auditory Nervous System Disorder- may or may not include hearing sensitivity loss, but often results in reduced ability to hear suprathreshold sounds properly. 3.) Functional Hearing Loss- exaggeration or fabrication of hearing loss |
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Threshold Vs. Suprathreshold |
Threshold measures try to find the lowest level at which a person can hear/understand speech. Suprathreshold seeks to determine how well a person understands what is heard, once it has been made audible. |
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Hearing Loss Types |
1.) Conductive- outter and middle ear; bone conduction WNL, air-bone gap significant 2. Sensorineural- cochlear, retrocochlear; bone conduction loss, air-bone gap not significant 3.) Mixed- air conduction loss; bone conduction loss, air-bone gap significant |
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Deaf Vs. deaf |
(Captial D) refers to a cultural group (lowercase d) is defined by an audiogram |
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Types of hearing aids |
Body Behind the ear In the ear In the canal Completely in the canal |
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Parts of hearing Aids |
All hearing aids have: microphone power source receiver Optional Parts: telecoil tone control ear mode |
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Cochlear Implants |
The functional replacement of the ear Parts: microphone speech processor external receiver internal electrode array |
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Assistive listening devices |
Sound enhancement technology: hard wired systems infrared systems loop induction systems FM systems bluetooth Telephone enhancement Systems television enhancement systems signal alerting devices |
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What allow things to vibrate? |
Elasticity and Inertia |
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Normal frequency for humans to hear |
20-20,000 Hz |
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Speech frequencies |
125-8,000 Hz |
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Retrocochlear |
display disproportionately low word recognition in comparison to pure tones, worst type of HL for word recognition, acoustic neuroma |
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Carhart's notch |
dip in audiogram at 2000 Hz due to stapes fixation |
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Pseudohypacusis |
faking a hearing loss |
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Speech recognition/reception threshold |
part of speech audiometry, uses spondee words (equal stress, cowboy) |
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OAE |
measures function of outer hair cells, absence of response suggests issues with the inner ear. |
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ABR |
abnormal response implies auditory neuropathy (retrocochlear problem) |
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Acoustic reflex delay |
reduced suggests retrocochlear problem, positive suggests possible acoustic tumor |
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Tympanogram |
graphical plot showing eardrum compliance at different values of air pressure |
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Tympanogram Types |
A: normal As: shallow compliance(otosclerosis, ear infection) Ad: deep compliance (ossicular disarticulation) C: negative pressure (eustacian tube dysfunction) B: flat- no pressure or complaince |
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Degree of hearing loss |
Normal -10-15- hears all speech sounds Slight 16-25 - may miss some consonants Mild 26-40 may miss some speech sounds Mod 41-55 will miss most speech at normal level Mod severe 56-70 will not hear any speech at normal Severe 71-90 will not hear any speech and almost any other sounds Profound 91+ will not hear any speech and probably only very loud sounds |