Nuopea

Thank you for the assistance.
The culprit has been located.
It was indeed one of the dinosaur mods,
specifically the Legacy of the Phanerozoic: Horrible Hands (https://mods.vintagestory.at/show/mod/25025) one.
The sound in question is labelled as "roar".
I do not know under what circumstances it is used,
however, it appears to be playing several tens of blocks further away than is reasonable,
especially given the high spawn rate of the creatures (I presume the sound is shared between all of them, merely shifted in pitch).

I'd be curious to use the accessibility tweaks mod to check from where and under what circumstances the sound plays.
For now I'm finally free of the cacophany.

Again, thank you very much for the suggestions,
I would have dreaded going through the entirety of the mod install.
Even just testing the dinosaur mods along (12 mods) took about two hours due to the loading times and crashes involved.
(That already includes halfing the mods every time.)
roar.ogg