CAOHC Study Guide with Questions and Correct Answers

NIHL (Noise Induced Hearing Loss) - 22 - 28 million US workers exposed to harmful levels of noise. Manufacturing accounts for most . Noise exposure - major cause of tinnitus. Tinnitus - is usually a high pitched sound that person hears, others usually cannot hear. Major warning sign of NIHL. What are the auditory effects of noise (NIHL)? - - hearing loss, high freq, usually bilateral, 1st seen at 3kHz-6kHz - tinnitus - communication interference, backgound noise in loud room, causes difficulty hearing - damage to Inner Ear/COCHLEA, permanent and progressive. What are the non-auditory effects of noise? - - effects job performance - irritability - trouble sleeping - concentration - increased BP & pulse. What are the lasting effects of NIHL (noise induced hearing loss) - Lasting effects of NIHL: High frequency hrg loss/damage to the Inner Ear- Cochlea. Usually has tinnitus, has difficulty understanding speech especially in noisy situations, social withdrawal, depression, effect on private life. At which level(s) does NIHL (noise induced hearing loss) first appear? - - appears somewhere between 3kHz and 6kHz - you see a Noise "notch" on the audiogram and with further exposure - the notch deepens and widens because it progresses.