Viva-facts On File: The Ency.of Deafness & Hearing Diso

The National Institute on Deafness and Other Communication Disorders reports that more than 28 million Americans are deaf or hard of hearing over 30 million more are exposed to dangerous levels of noise. Levels of hearing impairment vary from mild but important loss of sensitivity to a total loss of hearing. According to the American Speech-Language-Hearing Association, almost 13 in every 1,000 children under age 18 has some degree of hearing loss as do approximately 54 percent of adults over age 65. Because deafness and other hearing disorders affect so many Americans, from children to the elderly, a reliable source for clear, accessible information written for non-experts is essential. The Encyclopedia of Deafness and Hearing Disorders, Second Edition, Updated provides exactly this type of information for anyone concerned with hearing loss, their own or another's.