this post was submitted on 02 Feb 2024
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I feel like we are ways out from seeing anything like it. From what I've seen non-Newtonian fluids typically take a decent amount of energy to stop something and sound wouldn't have much energy compared to something like a bullet.


On a sidenote does Decibullz own a patent on percussive hearing protection or am I looking up the wrong term? I feel like there must be other hearing protection out there that is effective against sudden loud sounds.

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[โ€“] neptune@dmv.social 2 points 9 months ago (1 children)

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.

[โ€“] CanadaPlus@lemmy.sdf.org 1 points 9 months ago* (last edited 9 months ago)

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.