4 ms·
I've researched custom earplugs and you don't need them for sleeping. The point is more to have a flat frequency response. Nothing beats some 3M E-A-Rsoft FX.
by akvadrako 5y ago
I've researched custom earplugs and you don't need them for sleeping. The point is more to have a flat frequency response.
Nothing beats some 3M E-A-Rsoft FX.
- m463 5y agoI have used the 3M superfit 33's for years and they are excellent.