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for "What does this sound mean?" questions. Please describe where the noise is coming from, at least generally, and when it occurs, and what sort of sound it is (grating, squeaking, clatter, etc...).

10 votes
6 answers
93k views

Noise in stereo that changes pitch with engine RPM

I know the solution is to not use the inverter, there is no reason to be doing that, but I'm curious why the pitch of the noise fluctuates with the engine RPM. …
nwellcome's user avatar
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