In my own, flawed observation, I've noticed that V12 engines tend to have a fuzzy, buzzing sound to them. Like a swarm of Africanized killer bees.
I've also noticed that four cylinder engines have a lower, machine-gun kind of noise. Like dragging a cheese grater across cell bars in a big hollow trash can.
My question is this: does this "fuzzy" sound made by V12s (and conversely, the "banging" sound of four-bangers) come from the fact that there are more cylinders, and so combustion (or perhaps thrust) is more continuous, thus creating a fuzzy, harder-to-distinguish-where-one-ends-and-the-other-starts quality?
Thanks for your trouble in educating the unworthy. Here's my own little four-banger for your trouble.