Wonder of the inventor started their research with a Dixie Cup cut in half? If they weren’t so ugly there’d be useful. They would be much more hip with a bow on top through. These babies and a mask to go with them? Smokin! 😂
I've designed some like the foam ones mentioned, tried different materials and whatnot, but never got around to making them, since the soft foam plugs work so well. The hearing muffs, plastic shell, that I cut the fronts off of and removed the shielding material, did a great job of blocking ambient noise and making the sound more dynamic and cleaner.