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i would love a soundproof box with comfy cushions and floating on a perfect stable air cushion (like those vibration free platforms used in physics experiments)

i don't think the water is necessary, i find it distracting, personally, i've been in float tanks a few times and i'd rather it just be clean, soft, supportive but not sagging support

i bet if they used the sarcophagi as sensory deprivation devices they just used cushions too

RedTailHawk 10mo ago

Sensory deprivation tank fluid is extremely salty. Nowadays, we use Epsom salts, magnesium sulfate which is just magnesium, sulfur, and oxygen.

While Epsom salts as we know them today were discovered in England like 400 years ago, I'm thinking that any super-saturated saltwater solution might work, including natron water in lieu of magnesium sulfate.

They used natron for a ton of things, and according to @FoMaHun on X aka Marcell Foti, natron can be used to dissolve and reconstitute even granite which may explain a lot of the megaliths in the world. If they knew how to make rock dough, that explains nubs and scoop marks, and potentially the vases.

You are objectively right that water is unnecessary as people have become enlightened without resorting to artificial induction of theta waves by sensory deprivation tank.

I'm still leaning towards supersaturated natron water as the fluid but that's speculation.

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ᴛʜᴇ ᴅᴇᴀᴛʜ ᴏꜰ ᴍʟᴇᴋᴜ 10mo ago

yeah, i don't think that part is necessary

what is necessary is sound isolation, and those stone, sometimes single piece solid stone, sarcophagi are very sound insulating, possibly they did at one time have actual soft, fluffy, acoustically absorbent material like any form of cellulose on the seals, and yes, probably they did not have any ventilation, every hole for air is either a way for sound or a source of sound in itself, as well as air movement causing hair movement causing sensation

it is in fact perfectly safe to be in a mostly airtight container for at least several hours, and it is not impossible for the user to shift the lid and get air, at least, in most of the designs i've seen

the key thing is that most of them are made out of material that is extremely acoustically reflective, like granite or similar, and if you place a box like this, part way underground, in a space segregated away from people, with multiple buffering areas with lots of acoustically absorbent materials, and walls tilted to ensure that the only sounds that come down could maybe come from the sky

lots of details but i really didn't like the water part of sensory deprivation tanks, and i've been in them on three occasions, and i think it detracts from the experience actually

and i'd probably argue that a somewhat elevated level of CO2 probably does no harm to reaching theta either

another thing that helps us get to sleep is also cool, so there is that, if there is a gradient where you have a hot bath first, and then sit in one of these boxes, that would assist in stimulating the slide down to that state

hypnagogic state is a lot related to this, i can say that for a very large part of my life, until maybe the last 10 years, i have tended to fall into this state readily on a regular basis, often during daytime, and what you say about theta helping with learning, it would explain a lot about my above normal learning ability

RedTailHawk 10mo ago

Well, mass DOES attenuate noise and vibration so that does agree with the idea of fabricating these things out of stone. It is about sensory deprivation, so sound attenuation would be a part of this.

I would say that it's still useful to not feel your body being physically supported by any normal force. Floating in a sensory deprivation tank fluid might be the closest thing we have to parallel the bodiless awareness of enlightened higher consciousness.

The intermolecular bonding angle of water is roughly double the base angle of the pyramid. We know the base angle of the pyramid, 51.85 degrees, is important because the secant of it approximates very closely the Golden Ratio which is shown to be significant by Emergence Theory, market action, plant growth, human perception of beauty, etc.

Also, we are made largely of water, so as a medium to immerse ourselves in, a highly buoyant fluid would be useful to mute the sense of touch.

We know frequencies can be harmonic with one another. We know that frequencies are related to angles by phase offsets, therefore certain angles can be thought of as having harmonic relationships with one another as well. Mathematically this might be stated as "sets of multiples and factors".

My sense is that the deprivation tank fluid matters but you're right that the stone construction handles sound attenuation extremely well, as would being in the Queen's or King's chambers of that massive massive structure.