I don't have an autism related anxiety.
What I have is either hormonal, emotionally state based or purely situational due to EF issues -- than generalized intolerance and overwhelm of many things directly tied from autism.
Silence doesn't make me 'less anxious', a working, functional internal automatic self regulation does.
And I wish I have that 100% at the time -- but due to multiple factors, it's not always the case.
Silence itself is not what regulates (or dysregulates) me.
In part, sure, but it's not always the solution -- I have to understand if it meant because I need to rest my head, rest my hearing or rest whatever decoding systems I've been overusing in my head -- or not since if it's not, silence won't be a solution.
It's actually several, multiple and likely unpredictable and many are unavoidable factors -- ranging from which reproductive cycle I'm at, if and when I had abused my senses, if and when I got upset/happy/etc. during whatever specific situation that I suddenly cared too much, my sleep quality, my breathing, how much I worked out, what I ate, if the damn nose isn't blocked/dripping/making too much noise/itchy to annoy the heck out of me, etc.
Then if a situation happens during X, Y or Z state...
Or if the trigger exists during such time, or if the trigger suddenly does not exist because of A, B or C state.
There are states that makes me anxious, there are states that only makes my body anxious yet my mind is not, and there are states that makes my mind anxious yet my feelings are not, there are states that gives me emotions and drives me to have anxious thought and to me, they're annoying than worrying.
So many, it's maddening to try and track them all.
In another note; I miss true silence.
I also have tinnitus. Both ears. My left ear is particularly louder and on higher pitch than my right.
Likely caused by; partially disregarding sensory intensities combined with possibly a form of digital addiction back when I was a teenager (habit), and decades of ear pressure due to constant sneezing messed up my ears (a complication) it particularly messed up my left ear.
However, unlike most accounts I've read so far, I'm not particularly bothered by it.
I can truly imagine why it can be annoying -- I imagine days, years of my struggle breathing through the nose and all the trouble it caused.
No amount of silence could remove it or help me ignore it.
But for some reason, tinnitus just doesn't do that for me. I don't understand how or why am I not reactive towards something like this.
... Also covering both my ears with both my palms and fingers tapping on the back of my head method partially works for me; it only 'lowers' the left ear volume in my case; and it eliminated much of my right ear's tinnitus for a time though.
Well, I have sensory thresholds (a point when I'd start feeling overwhelmed and stressed, silence would give me a 'rest'), and I have sensory tolerance (which is high apparently) that I'm not dependent on silence as a 'comfort zone' -- to a point that I can take painful hyperacusis as painful yet not particularly anxiety inducing.
I do not have misophonia to be anxious about particular noises, nor have to rely that much on silence to specifically calm me down.