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

[Adam (synthDIY)]

Yeah, hypnagogic and hypnopompic hallucinations are pretty common, usually visual. Auditory is less common (although I’m sure most of us can recall coming out of a dream with a voice in our ears, only to discover it’s actually a sound coming from outside the window or in the street).  

When you think that those are the times when the voluntary parts of the brain are disconnecting/re-connecting to some parts of the peripheral nervous system, it’s no surprise


A

> On 19 Aug 2022, at 11:55 am, Ashlyn Black <ashlyn at ashlynblack.com> wrote:
> 
> Chiming in to add that Exploding Head Syndrome is a Thing(TM).
> 
> via wiki: "Exploding head syndrome (EHS) is an abnormal sensory perception during sleep in which a person experiences unreal noises that are loud and of short duration when falling asleep or waking up."
> 
> On 19/8/22 00:56, cheater cheater via Synth-diy 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
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