Husker
Just The Basic Facts
Fantastic explanation.The bass wavelengths are longer (peaks and valleys are spaced further apart) and create more air pressure, thus creating the drone at certain frequency.
It's that low resonance that creates the drone.
If you think of the exhaust system as one long speaker, it makes sense.
On an audio system you will never get the treble or midrange speakers to reproduce those low bass tones, they will not vibrate or rattle the inside of your vehicle, even if they do go in and out of phase. Add some 18" subs in the back and when they hit the right low frequency, rattle boom, bam drone.
There are some ways to combat this, thus the reason Corsa uses their RSC system, which tries to emulate the same lower frequencies, thus canceling them out.
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