I haven't been diagnosed, but have long suspected I'm on the spectrum due to meeting many of the criteria...and for me, my voice is either too loud or too quiet. Mostly too quiet. Sometimes I whisper and am told that I don't have to! Other times, I find myself talking in a monotone voice, and other times, I feel like I am panting from rapid, garbled speech I am trying to quickly get out. It's hardly ever too loud, but sometimes it is and I don't realize it. I think that's a big part of the disorder...the social awkwardness or unawareness. I seem to not know when I'm not being appropriate to the situation...but I'm hugely embarrassed when it's pointed out...or worse, talked about behind my back.