Play around with the Noise Meter and hear the different sounds and
sound intensities of everyday objects. The red bar below shows how
long it takes before a particular sound level becomes dangerous
to the human ear. For example, a chain saw has a sound intensity
of about 110 dB. Without proper hearing protection, running a chain
saw for only 2 minutes can become dangerous to the human ear! For more information on standards for noise exposure,
see Occupational
Noise Exposure, DHHS (NIOSH) Publication No. 98-126
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More about Hearing Loss Prevention