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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,
    "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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