If you think your hearing is just fine, think again. A federal study finds that about a quarter of people between the ages of 20 and 69 who think their hearing is good or excellent are in fact showing signs of hearing loss.
Hearing loss is often chalked up to noisy work environments or to aging. To be sure, those are major reasons that people's hearing becomes less acute. The Centers for Disease Control and Prevention's latest survey on hearing finds that 24 percent of hearing loss is due to loud workplaces.