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An Ohio fifth grader in the Dangerous Decibels program CBS News The Dangerous Decibels program teaches the physics of sound and how excessive noise can damage hearing.
It’s broken into what’s called the day-night average sound level, or DNL, which ranges from 65 decibels -- the lowest threshold of eligibility -- to 75 decibels, which can be harmful for ...
The noise threshold for abatement is 65 decibels, or what's called a 65 day-night level. Any property with noise levels at that point or higher can get relief through the program.
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