Hearing Physiology & Disabilities Flashcards
Sound propagates at 400 m/s. (T or F)
False (335 m/s)
100 dB causes damage to ear. (T or F)
True
Human speech range
300 to 3500 Hz
Human hearing range
20 to 20,000 Hz
age-induced deafness (presbycusis) causes (4)
- degeneration of organ of corti
- atrophy of cochlea
- loss of hair cells
- stiffening of basilar membrane
noise-related deafness cause
long-term exposure to noises damaging sensory hair cells
Conduction deafness is caused by…
lack of sound transmission.
Nerve deafness is caused by…
lack of transmission of electrical nerve impulses to the brain.
staples
convey sound vibrations from incus to inner ear
tympanic membrane (eardrum)
transmits and amplifies sound to inner ear
basilar membrane
fluid-filled channel leading to the cochlea
Hair cells are stimulated by movement of hairs that tickle the tectorial membrane. (T or F)
True
Cochlear implants adjust the incoming sound into ear. (T or F)
False (hearing aids)
Bone anchored hearing systems bypass the ear canal and middle ear. (T or F)
True
statoconia
crystals in inner ear that activate hair cells and help with balance
nystagmus
condition where ears move rapidly and uncontrollably
Types of hearing loss (4)
- Conductive loss (pathological defects of middle ear)
- Sensorineural loss (defects in cochlea)
- Damage to auditory cortex
- Functional deafness (perceptual deficits)
congenital hearing loss
hearing loss present at birth
Tadoma method
method where deaf-blind person places hand on speaker’s lips and jawline to feel movements and vibrations
How long does the average hard-of-hearing individual deny hearing loss?
7 years
