well. what the title says. what factors come into play in an engine noise?
from that , of course we can add all kinds of questions such as: can i make a japanese econobox sound like an angry race car (as opposed to sounding like perpetuous farting) while keeping it street legal?
of course there are so many aesthetical concepts or archetypes in" engine noise" say muscle car rumble, rev-to-the-moon, but these are consequences of decisions engineers make about engines, right? therefore, there must be some sort of common aspects, right'