Non-human animals have all the same "noise canceling hardware" as humans (It's mostly in the hind-brain), so it can't just be for speech. I know that that echo/

Non-human animals have all the same "noise canceling hardware" as humans (It's mostly in the hind-brain), so it can't just be for speech. I know that that echo/noise canceling hardware plays a big role in sound localization. This is probably why the noise and echoes sound louder on a recording. They don't change the way that they should when I move my head, so my brain can't figure out how to cancel them.