text: I'm an Audiologist\n\nThose numbers are about the maximum noise reduction rating for an in-the-ear plug.  Because sound is vibration, we can hear through the vibrations in our skeletons.  In order to block more sound, an ear muff is necessary, as it cushions the temporal bone and area around the ear.  Unfortunately, the earmuffs aren't comfortable to sleep in.\n\nCustom earmolds even only block about 30-33dB in the low-to-mid frequencies, where most voices are, but do block up to 40-45dB of the higher frequency sounds.  \nhttp://westone.com/attenuation.html\nhttp://westone.com/earmold_styles.html#protect\n\nThe ones that are for hunting are only for sudden noises, and some of them actually AMPLIFY some sounds, so the hunters can hear the animals rustling in the brush.  They would not serve your purpose, unless you're trying to sleep through a fireworks display or 21-gun salute.\n\nWhat sounds are you trying to block when you are sleeping?  I have tinnitus (ringing in the ears - so plugs would make that worse.  In addition, I have cats and family members who make noise when I'm trying to sleep, so I run a fan all night long to mask the noises.  If you're trying to block a partner's snoring, you are better off getting them evaluated and treated for the snoring by an Ear, Nose and Throat specialist.  Not only will you sleep better, but he/she will, too!