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DoD Hearing Technician_ Chapter Four - Anatomy, Physiology, and Diseases of the Ear
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DoD Hearing Technician_ Chapter Four - Anatomy, Physiology, and Diseases of the Ear
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DoD Hearing Technician: Chapter Four -Anatomy, Physiology, and Diseases of
the Ear
What is Meniere's disease?
o An inner ear disorder that causes vertigo
What are some causes of hearing loss?
o Ear infections
o Diseases; measles. mumps. & Meniere's
o Presbycusis
o Congenital malformations
o Exposure to ototoxins & hazardous noise
How does hearing loss have a on quality of life?
o Communication difficulties
o Frustration
o Hypertension
o Anxiety
o Depression
o May contribute to injuries & mishaps
What are auditory effects of hearing loss?
Effects directly related to the ear and hearing
,What is a common auditory effect of hearing loss?
Difficulty understanding speech
What area of the ear is most commonly affected by hearing loss?
o High frequencies
What letters can produce a sound in the high frequency range?
oF
oS
o Th
oK
oP
oT
What words may sound similar to each other for someone with hearing loss?
o White
o Right
o Lift
o Sift
o Hit
o Sit
What is tinnitus?
Persistent ringing or buzzing in the ears
, Tinnitus is often an early indicator of what?
o Ear damage secondary to noise exposure
o May become permanent and debilitating
What is hyperacusis?
o Abnormal sensitivity to loud sound
Note: Is an auditory effect of hearing loss
What non-auditory symptoms problems may be caused by untreated hearing loss?
o Irritability
o Fatigue
o Social withdrawal
o Loneliness
o Reduced alertness
o Impaired memory
o Reduced job performance
o Diminished psychological
o High BP
What is the frequency range of a healthy human?
20-20,000 cycle per second (Hz)
How do sounds begin?
Air vibrations that activate a series of reactions in the auditory system
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