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How s Your Hearing

CDC report says it may not be as great as you think

Hidden hearing loss doesn't show up on standard hearing tests but can rob the ability to hear conversation in a noisy setting. Getty Images/Canopy . The CDC analyzed more than 3,500 hearing tests conducted by the . It found that 20 percent of people who thought they could hear well and who said they didn't work in a noisy environment still had — some of them in their 20s. The type of loss they had, including a drop in the ability to hear , indicated that noise damage may be to blame. Get instant access to members-only products and hundreds of discounts, a free second membership, and a subscription to AARP the Magazine. Even more surprising, more than half of the 40 million adults who have noise-related hearing damage suffered it away from the workplace, from exposure to noisy rock concerts, sporting events, leaf blowers, traffic and other sources, the CDC reported. Adding to the problem, 70 percent of people exposed to loud noise never or seldom wear . Although noise exposure in the workplace is well documented as a cause of hearing loss (the danger level is set at eight hours at more at 85 decibels, equivalent to the sound of heavy city traffic), the proportion of people with this kind of loss who don't have a noisy workplace is an indication of how loud our everyday world is. Recent research has also spotlighted what scientists call hidden hearing loss — hearing loss that doesn't show up on standard hearing tests but can rob the ability to hear conversation in a noisy setting, . The loss, Harvard otolaryngology researcher M. Charles Liberman explained, may be caused by loud noise that damages the connections between hair cells in the inner ear and the nerves that carry the hearing signal to the brain. You can test how well you understand speech in a noisy environment using a special online exercise prepared for the Associated Press in conjunction with the Mailman Center for Child Development at the University of Miami. To take the test, . You will be asked to repeat a series of sentences. The exercise begins in quiet, but then slowly introduces background noise. The noise comes in six levels, faint at first but eventually louder than the words. People with hearing loss will start to have some trouble understanding the words at the second or third level, the AP reported. What both the CDC report and the recent research into hidden hearing loss indicate is that people need to be aware of the noise they are exposing themselves to, and wear earplugs or noise-canceling headphones to protect their hearing. People should also keep the volume down, whether it's while watching TV or listening to music or other programs through earbuds.

Hearing Loss Health and More br

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