Noise induced hearing loss: What's that?

Of the 40 million people with hearing loss in the U.S., 25 percent of those, or 10 million, have lost their hearing as a result of exposure to excessive noise. But how much noise is too much?

Measured as decibels (dB), the acceptable manufacturing noise standard is to allow a daily exposure up to but not over 85 dB in an eight-hour period. More than that can cause permanent injury to our hearing. This is likely due to wear and tear on the tiny hairs that vibrate when sound is introduced. It’s like a line of kids walking across one path on the grass day after day. A little is good, too muc...


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