Pinephone speaker buzzing whenever power sent to it

[WaldoTheRanger]

Just recently received my pinephone (also my first phone. not sure if that was a good idea or not yet)
At first the internal speaker was not playing any sound whatsoever. I would click the test speaker button and nothing would happen. The earpiece worked fine so I didn't mind for awhile.
After I got it connected to a cellular network, I decided to open it up to see if I could see anything obviously wrong, like a fly in between the contacts or misalignment or something. My understanding of circuits is high school physics level, so this was probably stupid also.
I didn't see anything, so I closed it up again, and it magically started outputting sound.

However, now both the speaker and the earpiece buzz uncontrollably whenever they're active.
When I select each one to test, even before playing any sound it buzzes. the earpiece is better, but still noticeable.

I've already inspected it for signs of being blown, but I didn't see any obvious holes or uneven vibrating.

So, what do you guys think the problem is, and how should I fix it? Is there a better way to detect a blow?

thanks in advance

[edit]
it is actually quite bearable with the soft case on. I'm still concerned, but it's not longer a big deal.

[edit 2]

Would a high pitched whining noise have anything to do with the battery being drained?
if not then we're back to it being a problem.

You do not state what distribution you use, so I assume it is postmarketOS stored in emmc. I would suggest that you install a recent distribution of mobian on sdxc card and test sound that way.
Most probably that problem will be gone.

I'm actually using manjaro off of an sd card for the most part right now. I have tested postmarket on emmc though, and it did the same thing.
for some reason when I used that fonky 13 os multibook sd card mobian didn't play sound at all, and neither did ubuntu (though ubuntu did make that weird whining noise when starting up)
actually postmarket/phosh didn't play anything on that card either. I'm guessing that's broken. I'll try to get some real installs for testing in a bit.

actually it seems to have gotten a lot better after just one stability update on manjaro. I find it bizarre that something like that could be caused by a software bug, but alright.