Hearing - Types of Hearing Problems
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6 terms
Terms | Definitions |
|---|---|
 3 types of hearing problems | 1. conductive hearing losses; 2. sensorineural hearing loss; 3. mixed hearing loss |
| conductive hearing loss | 1. defects in outer or middle ear that prevent normal trans of sound to tympanic membrane and then to bony ossicles; 2. sounds muffled as if cotton were in ear |
| causes of conductive hearing loss | 1. hereditary; 2. injury perforates eardurm; 3. cerumen impairs conduction; 4. otitis media or plugged eustachian tubes; 5. otosclerosis - spongy bone grows over stapes and prevents vibrations |
| sensorineural hearing loss | 1. damage to inner ear cochlea; 2. neural fibers; 3. brain |
| causes of sensorineural hearing loss | 1. presbycusis; 2. birth rubella; 3. bacterial viral; 4. noise damage; 5. vascular incidents; 6. SE of drugs; 7. meniere's, tumors, thyroid, MS, edema in inner ear |
| mixed hearing loss | both conductive and sensorineural |
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