Hi Swoop223,

I have a Roline Sound decibel meter, but this will only measure the total noise level. Even if you place the device close to the component, there will always be background noise of the engine and the other components. The problem been is that if there is two components with db reading of 60db the device will measure 63db, so you wont know the split from this device reading. Maybe if there was a device to pick up the frequencies of the noise?

Have ever try to single out noise levels of a truck before?