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.
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?