An NRR (noise reduction rating) can be a rating that displays how many decibels of noise a set of earplugs can block. The higher the NRR, the greater sound the earplugs will block when applied as intended. SEE IT Why it made the Reduce: From reliable audiology industry experts, these https://jackiew111jsa1.ltfblog.com/23681677/ear-plugs-for-stretched-ears-can-be-fun-for-anyone