Thanks again for the amazing replies. I have been working on the vehicle since with MLV, absorption, etc., but have not made any notable progress.

Another issue is high frequency tonal noise from the instrument displays and hvac/dash area even when the vehicle is parked. It’s essentially coil ...

The sound is actually exceptionally quiet, even compared to other EVs. My wife and other passengers are not bothered by it one bit. I think the engineers did a great job, it's just a case of a particular set of ears.

Wow, your replies are so heartening. I didn't expect much of a response at all, and just wow.. Thank you! :D

Funnily enough playing music loud is really the only solution, so long as it contains enough high frequency content to mask the motor and inverter. To me, that's kind of a "don't shower ...

I know it sounds like scifi...
Have you considered makeing an active damping system? Try to measure inverter sound frequency in general.
Then reproduce the same sound by a large speaker and experiment with harmonics. There should be a response frequency where both sounds would cancel each out.
I ...

I would like to reduce the noise from the inverter in my electric vehicle. I have excellent hearing plus tinnitus, and find the 10-12 kHz sustained sound to be fatiguing over time.

Has anyone sound proofed their EV inverter? Obvious concerns are adding heat and interfering with the airflow around ...