Now sure, a person during the roman times or the middle ages could be caught saying the same thing and couldn't be more wrong. And sure it's entirely possible that we'll figure something out that will revolutionize our knowledge of the universe entirely... but every time general relativity predicts yet another observation to an annoying level of perfection that chance becomes smaller and smaller.
I'll again say that I think it's extremely hubristic to think that human civilization has somehow figured out "most" scientific knowledge in the last couple of centuries. This human-centered attitude is not unique, though, which is kind of my point: it's not a new thing at all to think that the current level of knowledge has nowhere to go. It's just the typical human hubris that has been with us forever.
We're certainly still wrong about exotic types of matter, gravity, fundamental particles, the ways completely arbitrary things function, like genes in a cell, etc... but we know that cells exist, what they're composed of, and we're definitely not wrong about that, and that is frankly infinitely more knowledge than we've ever had before. What's left to find are mostly increasingly more nitpicky details that are nonetheless very important, but they don't change our understanding anywhere nearly as drastically.
To wrap back around to my original point, in comparison to everything else the amount of knowledge we've gained on paranormal things since tribal shaman times is about zero. It's still all hearsay and speculation and it's not for the lack of trying.
Just to put loud in perspective: seems like cavitation produces ultrasound in the ~30db range at the highest[1], which is roughly the level of a whisper. I haven't knowingly captured trees in my ultrasound field recording, but it seems fun to try. That should be loud enough to pick up something with an ultrasonic recorder close by, I'd think, which is pretty cool -- I assumed you'd need to do something like David Dunn and embed microphones into the trees.
[1] https://nph.onlinelibrary.wiley.com/doi/full/10.1111/j.1469-...
:)
It's pretty clear that we as ugly giant bags of mostly water don't perceive much of what's going on and tack a lot of made up shit on top to make it more functional. Like colours which aren't really a thing, objectively speaking (ask a colour blind person or check what the JWST sees in outer space).
And yet we know that we don't see these things, because we can detect them indirectly. And we've been finding methods of better indirect detection of literally anything for millennia and mapping it all into the areas we can detect. If there was a configuration of carbon in our heads that mixed with drugs detects something, we'd have built a artificial sensor out of it by now (alas it is but random noise that does not correlate with anything, not even itself). So while there's probably still particles and fields that we can't detect yet and some we even know we don't know about (ahem dark matter/energy ahem), it wouldn't be too much hubris to say we've got most of it covered by now.