[sdiy] How does your sound perception change while you're falling asleep?

[cheater cheater]

Ah, yes, auditory fatigue is a thing that I've experienced as well.
You just need to listen to a saw oscillator for an extended period of
time.

The flashing thing - did you know that the visual cortex has a
resonant frequency, and there are projects that trigger it to create
hallucinations?

I've just remembered another auditory phenomenon. Sometimes, rarely,
but this has happened on a handful of occasions including recently,
when I'm really tired, I'll be dozing off, and if I decide I don't
want to fall asleep, sometimes I'll have a period of increasing
weakness washing over me (normal when tired), but then I'll snap out
of it. Sometimes this "snapping out of it" is accompanied with the
sound of a spark going off. Like in a spark gap, like say a gas range
starter. Really bizarre. It's like that gate effect I described
previously has some sort of crazy transient overshoot when it's being
opened again.

On Thu, Aug 18, 2022 at 7:15 PM Barry Klein <barryklein at cox.net> wrote:
>
> I’ve noticed a couple things that may relate.
> 1. Metal detecting with a PI detector that has a warbling tone, after several hours detecting, take off the headset and the ambient sounds are modulated by that same warble rate.
> 2. Using a light and sound meditation unit, My brain/sight “circuits” would retain the flashing. Bizarre to think something in me is doing that.  Why?  Probably does this somehow with the audio depending on what form it is. I had an alpha wave detector that would warble when alpha was present. But then I’d recognize this and break out of the alpha often.
>
> Barry
>
>
> > On Aug 18, 2022, at 9:44 AM, cheater cheater via Synth-diy <synth-diy at synth-diy.org> wrote:
> >
> > Hi all,
> > I'm sure many have noticed that your sound perception changes in the
> > moment immediately before falling asleep. I was wondering if anyone
> > would like to describe what effect they hear. Since we all know
> > synthesizers, synth and audio engineering related terms are going to
> > be very useful here.
> >
> > I suggest writing down whatever you can remember before reading the
> > rest of the thread, so you don't get influenced. Then read the thread
> > to see if anything seems familiar.
> >
> > If you make any observations in the future, come back to the thread
> > and add to it.
> >
> > My description follows below.
> >
> > ------------------------------------------------------------------
> >
> > I've been dozing off just now with the AC on (wide band noise, biased
> > towards LF). The sound suddenly changed to something like a very deep,
> > quickly animated chorus effect applied to the sound. By quickly
> > animated I mean it sounded like multiple parallel stages (3-5?) with
> > separate LFOs where you could hear LFO peaks of the various LFOs maybe
> > 5 times per second.
> >
> > Other times, in a room without wideband noise - eg watching a podcast
> > on youtube - sound seems to cut off fairly cleanly with a short decay,
> > like maybe 0.2-0.5s decay. If I'm coming out of it sound will show up
> > again. If this keeps on cycling I can perceive those holes in sound.
> > It sounds like the cleanest ducking gate, no click, no coloration.
> >
> > I remember back in high school I wasn't getting a lot of quality sleep
> > so once or twice before falling asleep i'd hear auditory
> > hallucinations. Usually what amounts to children's voices laughing or
> > saying something I can make out but not understand. Not exactly
> > related, but one time I was so tired at school that I dozed off
> > between classes. A classmate tried waking me up and I started talking
> > to him, still in a dazed state, but no real words came out, just
> > gibberish. That's never happened before or since, and it was odd
> > enough that I took note of it.
> >
> > Best regards
> > _______________________________________________
> > Synth-diy mailing list
> > Synth-diy at synth-diy.org
> > http://synth-diy.org/mailman/listinfo/synth-diy
> > Selling or trading? Use marketplace at synth-diy.org
>