Also, does exhaust pitch stay the same, given the same RPM but in different gears? I ask because it sounds like pitch decreases as you go into higher gears.
In: Other
“Higher pitch” means higher frequency: The air moves back and forth with a higher frequency. Higher rpm means engine parts move back and forth with a higher frequency, and correspondingly the air does the same. If you shift to a higher gear the rpm goes down (at the same car speed), so the pitch goes down again.
As a general guideline, more engine power makes the engine louder. And higher rpm means more engine power.
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