CGSC379 Study Guide - Midterm Guide: Aminoglycoside, Mycin, Electrical Measurements
21 Aug 2018
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About 2 to 3 of every 1,000 children in the u. s. The greatest amount of hearing loss: 60-69 year olds. Age is the strongest predictor of hearing loss among adults ages 20-69. Men are almost twice as likely as women. Third most common physical condition (after arthritis and heart disease) Most common causes in adults = noise, aging. Noise-induced: 1 in 6 teens show symptoms, 9 in 10 teens are engaged in risky activities, being exposed to more than 85 db of sound for 8 hours. Easy and painless: usually only takes a few minutes, babies are often asleep, early hearing detection and intervention (ehdi) the process of screening every newborn for hearing loss prior to hospital discharge. The ear is the only organ that does not grow after birth. The outer ear --- figure 3. 1, figure 3. 2. Pinna (auricle: has a natural resonation at about 1500. Hz: shape helps collect and localize sound.
