I think a fluid that you put in your ear muffles everything and makes it hard to hear. Being newtonion or non-newtinion. I can’t imagine a way for it to be useful as a general solution. You’d need to take it out anyways in order to hear normally. And then I don’t know how this would compare to an already existing high quality hearing protection. There are some available that supposedly are somewhat linear in the frequency spectrum.
Not that any of that would work, but just as a thought experiment: under sudden sonic pressure the fluid would become more crystaline and would then actually make the sounds travel with less resistance, so maybe that would actually make it worse?
From some quick searches (so not a definitive answer, but a place to start), it seems that sound waves are most likely longitudinal which doesn’t cause shear. However, shear forces can be created by sound waves when they hit a surface.
From that information, I don’t think the shear energy imparted by a sound wave is very large. Since non-newtonian fluids only thicken under shear, they may not actually behave very differently than a regular fluid in these conditions. Preventing sound waves from traveling is usually accomplished by causing lots of scattering (open cell foam) or by absorbing the energy in a viscoelastic material (usually polymers).
This kind of thinking is just superstition. The earth magnetic field does NOT influence in any way your sleep.
This is just magical thinking distortion.
The bed must be only in a cozy and dark environment, not too warm nor too cold. Also, your bed room must be used only to sleep or sex. Don’t do any exciting or stressful activity on your bedroom.
Do you mean to say that sex isn’t exciting. Or are we only supposed to have boring sex in our bedrooms. Or are you implying that the only exciting sex happens outside the bedroom?
Sex is for procreation only. No fun or excitement allowed. It must be silent, and exclusively in the missionary position. Deviation from these rules is unacceptable.
That’s a strong claim you’ve got there. It seems humans do possess some amount of magnetoreception, there’s even a suggested mechanism. It might be jammed by certain radiofrequencies, although I don’t know if they are still in use. Some other mammals have been shown to sense magnetism too. Personally, when I’m in a bed, especially a new one, I feel my rotation relative to my normal bed. It isn’t very precise and it’s difficult to test, so I can’t be entirely sure, but that’s how it feels. I don’t know about any studies relating magnetism and sleep. I know there historically were people who claimed it matters to them, but I think that unless you already know that it matter to you, it probably doesn’t. I’d say that much more important is darkness. Also, I heard people feel better with feet towards the door, but I don’t know if it’s proven in any way.
I wonder why I’m being downvoted. I very much welcome discussion. If you want to tell me why I’m wrong, like that cryptochromes cannot be used in sensing magnetic field upon closer look etc., I’d be excited. Disagreement without pointing out any mistakes I did brings me nothing.
If it’s just disbelief, I would’ve preferred being asked for sources. Even wikipedia mentions some of what I wrote (en.m.wikipedia.org/wiki/Magnetoreception) and while I admit my source isn’t primary literature, it is a monography about senses and I would’ve made an effort to track down at least some of the original papers.
I don’t think it really makes a difference unless you’re really into feng shui. The best position for your bed is whichever one allows you to sleep most comfortably
We already have computers that can determine which sounds to cancel out. That’s pretty cool.
Sound isn’t going to be like a bullet or an electrical storm hitting the grid. I don’t think you can just make a material that blocks out sound when it reaches a certain level and allow it below the threshold. Definitely an interesting theory but I am not sure how it would be designed.
Compression thickening/thinning, which only starts after a certain rate of change. I’m not sure what materials have such a property. Then, you’d incorporate it into a composite which dissipates sound selectively in one state. One idea is a fibers of a material that matches the impedance of the fluid during quiet periods, but scatters it as impedance shifts during high-energy periods.
Maybe you could use standard shear thickening somehow, but it would be a lot harder as sound only travels through air compressively.
The only real effects that I know of are light related. If you’re trying to sleep, making it as dark as possible is best. So using an eye cover or blackout curtains can help. But when you want to wake up, sunlight helps us wake up easier. This can be tricky in the winter when the sun rises later and doesn’t peek into your window until after you’ve already had to wake up. I think there are some phone alarms that will slowly add a warm light to the room to help with this, but I couldn’t say if they actually work or not. Hope this helps.
I don’t have any data to bring to the table, but just think about our evolution. It makes sense to me that we evolved to be able to get our sleep when we can where we can, rather than needing to face a certain direction or have the window to a particular side.
Psychologically, it makes sense to me that you’d be most comfortable in a position where you can see the door, but I have to assume our ancestors 10,000 years ago didn’t have the luxury of pointing northward or something. Maybe it’s best to have a window facing east so you can get natural sunlight in the morning.
The important facing questions are “where is my window facing” and “where is my bed facing in relation to the window and door”. Magnetism is irrelevant, as we are no migratory birds who can actually sense that field.
Although you’re practically right, we can technically actually sense magnetic fields. It’s incredibly weak and you have to drown out all other senses, but it’s possible.
Facing away from the door (I.e. having the door in the back) makes some people anxious, like people usually turn and face the door in an elevator. That’s why a hotel bed often faces the door.
The position relative to the window is a question of light.
situational awareness. humans instinctually need to feel safe. sleeping with your head right by the door gives you the least amount of reaction time/space to stave off invasion. inagine a rabbit sleeping with its nose out of a rabbit hole. in modern times with modern locks and security, its not a big consideration to be faie. but the instinct is there. people like headboards on beds for the same cavelike feelibg of protection. so yea head away from the door, bed not by the door. windows used to be avoided for being drafty or leaking light.
It’s safest to keep your bed against an interior wall instead of a window, in case of earthquakes or other natural disasters. Or even someone crashing their car into your house, bombs dropping, etc.
I don’t know about scientific studies, but in my experience I sleep best when the mattress side of the bed is positioned towards the ceiling. Also, putting the bed in front of the door can be somewhat inconvenient, specially if the door opens inward. Other than that, everything else seems to mostly be fair game.
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