Measuring Exhaust Noise

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  • Guest
    #1

    Measuring Exhaust Noise

    Anybody know how the police actually measure the noise from your bikes exhaust? I see several limits (all measured @ 50 ft), below 35 mph, above 35 mph and stationary, do they usually just do stationary? If so, do they just check at idle or make you rev the bike?

    Thanks,
    Dave
    Tags: None
    • Steve
      GS Whisperer
      • Jun 2005
      • 35925
      • southwest oHIo
      #2
      Last I heard, they were still trying to find a method that would work.

      Trying to measure sound to meet a standard requires a standardized environment.
      Exhaust noise level of a bike in an alley will be louder than the same bike in a farm field, for example.

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        • airbornespud
          #3
          i'm pretty sure it's more subjective. when i got pulled over by a sheriff's deputy for a loud exhaust in my car years ago, he passed me going the other direction and whipped around and pulled me over. so, unless he had a decibel meter running in his car all the time, there's no way he knew exactly how loud my car was. i've had a couple of loud bikes in the past and never been hassled, so unless your local guys are just out to get people, i wouldn't worry about it too much, unless your bike is ridiculously loud. then maybe throw a baffle in it for daily riding.

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            • Guest
              #4
              Originally posted by airbornespud
              i'm pretty sure it's more subjective. when i got pulled over by a sheriff's deputy for a loud exhaust in my car years ago, he passed me going the other direction and whipped around and pulled me over. so, unless he had a decibel meter running in his car all the time, there's no way he knew exactly how loud my car was. i've had a couple of loud bikes in the past and never been hassled, so unless your local guys are just out to get people, i wouldn't worry about it too much, unless your bike is ridiculously loud. then maybe throw a baffle in it for daily riding.

              The reason I'm asking is I hear CT is setting up spot checks lately and they do use a sound level meter. I have measured my bike (yeah I have a meter) and I start getting above the limits around 4500 RPM.

              -Dave

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                • airbornespud
                  #5
                  Originally posted by 5azzmonkey
                  The reason I'm asking is I hear CT is setting up spot checks lately and they do use a sound level meter. I have measured my bike (yeah I have a meter) and I start getting above the limits around 4500 RPM.

                  -Dave
                  call 'em and find out right from the source. they should be willing to help a citizen that wants to abide by the law. even if it is just barely.

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