Decibels on a stock raptor!
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EDIT: I did some searching and found it to be 1/2 meter from the pipe, at a 45 degree angle from the opening, using the vehicle centerline as the plane to get 45 degrees.... Don't guess it matters much as long as it's at 45 degrees to the opening.... like this stuff
Measuring the Vehicle Sound
Make sure the engine is warmed up and the transmission is in neutral. Have the rider sit on the motorcycle with both feet on the ground, or on the footrests, so that the vehicle is vertical and stationary.
Hold the sound meter (see diagram below):
At a 45-degree angle to the exhaust centerline (the normal line of travel)
Parallel to the ground
20 inches (0.5 meter) to the rear of the exhaust outlet
At the same height as the exhaust outlet
Determine the test RPM for the make, model, and year of vehicle
Set the vibrating reed tachometer to the test RPM, or attach an electric tachometer.
Have the rider or assistant hold the vibrating reed tachometer against any solid part of the vehicle, or have the rider or assistant read the meter of the electric tachometer.
Have the vehicle operator slowly increase the engine speed to the test RPM. Have the vehicle operator or assistant signal when the correct RPM is held.
Read the sound level meter when the correct RPM is held.
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