musician's earplugs

mu·si·cian's ear·plugs

(myū-zish'ănz ēr'plŭgz)
Custom-fitted earplugs that attenuate all frequencies evenly in relation to normal hearing sensitivity; allow musicians to hear music at levels below the damage-risk level without sacrificing sound quality; must be fitted by a licensed hearing health care professional.
References in periodicals archive ?
Effect of Musician's Earplugs on Sound Level and Spectrum During Musical Performances," International Journal of Occupational Safety and Ergonomics, 2011; 17(3): 249-254.
Wearing musician's earplugs may limit this," he says.
Break up your exposure to high decibels: ensure that ten minutes of every hour in a club or at a concert is spent with as little noise as possible and use musician's earplugs.
Effects of musician's earplugs and protective headgear on localization ability in the horizontal plane.
and the Etymotic ER25 musician's earplug on localization performance in the horizontal plane?