Rehabilitation Sciences 3760A/B Lecture Notes - Lecture 1: Conductive Hearing Loss, Sensorineural Hearing Loss, Inner Ear
2 Apr 2018
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Document Summary
Hearing and sound levels change in 10 decibels means 10x louder. 120 decibles + being by noisy automobiles can be damaging too. Hearing and sound hz: sound is measured in hz, human ear is sensitive to range 20hz 20,000hz. Frequency = pitch: human speech is between 500 hz and 2000 hz. Hearing impairment: de nition, hearing loss of any degree, especially in the range of 250- 4000hz, that impacts daily functioning. Level of severity: site of loss, age of onset. Also use pta3 - tested using low, mid, and high-frequency sounds. Site of loss outer ear pina - serves as a funnel ear canal - sends sounds to ear drum ear drum - vibrates/ oscillates hearing issues its a conductive hearing issue: middle ear - ampli es. 3 ossicles in middle ear incus, stapes, malleus conductive hearing loss inner ear oval window ampli ed cochlea.
