Hearing Aid Dispenser's Written Exam || 100% correct answers.

Why do we perform audiometric tests? correct answers to determine the different characteristics of a hearing loss if one presents A hearing loss is characterized by what three descriptors? correct answers 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 correct answers 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? correct answers - 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? correct answers Yes (and surgically) Sensorineural hearing loss correct answers 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? correct answers - disease - birth injury - ototoxic drugs - genetic syndromes - noise exposure - viruses - head trauma - aging - tumors Can sensorineural hearing loss be medically or surgically corrected? correct answers No Mixed hearing loss correct answers 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 correct answers Normal: -10-25 Mild: 26-40 Moderate: 41-55 Moderately-severe: 56-70 Severe: 71-90 Profound: 91 +