OSHA has a limit of 90 dB over 8 hours. NIOSH has a limit of 85 dB over 8 hours of unprotected hearing.
If you have a smart phone, there are apps out there to make your phone into a reasonable decibel meter. Make sure to measure where you work, and at the throttle/loads you are measuring to. Measuring at the source of the sound is NOT what you are hearing 6' away.
Note that the decibel scale is not linear, but logrighmic. Meaning......a shift from 80 to 90 decibels is a lot louder than you think.
Take care of your ears. You can buy hundreds of really good mufflers for the cost of a decent set of hearing aids these days.
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Today's Featured Article - Show Coverage: Godfrey, Illinois Country Days - by Cindy Ladage. Except for last fourth of July's Old Gold show in Springfield, Illinois, I don't remember when it was so hot. Nevertheless, the heat didn't keep vendors and visitors alike from enjoying the third annual Country Day's Event. Jane Elliott said the event was originally a one man show. "Barry Seiler, owner of Country Town Farm Supply store used to invite people up to the Johne Deere store. He would give hats and a free meal for everyone that brings a tractor." Elliott said while this
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