I can deal with most low and medium volume sounds, if there aren't too many and I don't need to actually do anything with them. Like a bird singing and a cricket chirping. Throw in a frog croaking and it becomes a jumbled mess in my head. As Misery said, there's no filtering nor sorting.
Any of these can lead me to a meltdown if I'm forced to try to get something done, or a brief shutdown if I'm not.
-loud sounds
-multiple sounds
-more than one person talking
-one person talking with sound in the background
-one person talking that I can't see (I use their mouth for timing signals to parse the words, sort of)
My biggest problem is a delay in audio processing that is obvious enough to have been measured with an old school mechanical stopwatch. My second biggest problem is an APD that is exactly analogous to dyslexia but with auditory word recognition. Luckily, I have somewhat of a photographic and auditory memory so over the years I just learned to let my brain put the pieces of speech together and then listen to them on the delayed version instead of the "live" one.
Like all other autism workarounds, it works but it is fatiguing and required downtime afterward.
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“For small creatures such as we the vastness is bearable only through love.”
―Carl Sagan