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Db reduction vs. NRR, I'm confused

Discussion in 'Lawn Mowing' started by lawncuttinfoo, Jan 19, 2006.

  1. lawncuttinfoo

    lawncuttinfoo LawnSite Bronze Member
    Messages: 1,010

    Anyone know what the difference is between NRR (I'm guessing it stands for "noise reduction rating") and Db reduction?

    Those new "race quiet" brand plugs looked excellent,
    http://racequiet.com/
    "42 decibels of noise reduction across the entire sound spectrum"

    The foam plugs i use only do 26 db noise reduction, but more information on the race quiet says "With an NRR of 20..."
    I'm guessing "NRR" stands for a more accepted testing of noise reduction since there is a brand that sells "Highest rated reusable ear plugs you can buy (NRR 33)"
    And most foam plugs sold for sound safety are 22-30 Db reduction ( I think)
     

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