Hearing Aid Dispenser's Written Exam Accurate 100%(RATED A+)

Why do we perform audiometric tests? - ANSWER to determine the different characteristics of a hearing loss if one presents A hearing loss is characterized by what three descriptors? - ANSWER 1. Type of hearing loss (conductive, sensorineural, mixed) 2. Degree of hearing loss (mild, moderate, etc) 3. Configuration of hearing loss or what the hearing loss looks like (ex: flat, rising, sloping, etc) Conductive hearing loss - ANSWER a loss that occurs when sound is NOT transmitted efficiently through the ear canal, eardrum and ossicles of the middle ear. What can cause a conductive hearing loss? - ANSWER - middle or outer ear infection - perforated tympanic membrane - cerumen impaction - benign tumors - absence/malformation of the outer ear, ear canal, or middle ear Can conductive hearing losses be medically treated? - ANSWER Yes (and surgically) Sensorineural hearing loss - ANSWER occurs when there is damage to the inner ear (cochlea) or to the nerve pathways from the inner ear to the brain (retrocochlear) *permanent loss* What can cause a sensorineural hearing loss? - ANSWER - disease - birth injury - ototoxic drugs - genetic syndromes - noise exposure - viruses - head trauma - aging - tumors Can sensorineural hearing loss be medically or surgically corrected? - ANSWER No Mixed hearing loss - ANSWER occurs when there is damage to the outer and inner ear (cochlea) or auditory nerve * air-bone gap with abnormal air and bone conduction thresholds* Degree of hearing loss - ANSWER Normal: -10-25