Answer: earplugs

AnswerCrossword Clue
EARPLUGS

Defense against snoring

EARPLUGS

Silencers, of a sort

EARPLUGS

Sound-blocking devices

EARPLUGS
Noise-reduction devices
EARPLUGS
Noise dampeners
EARPLUGSNoise reduction devices
EARPLUGSSwimmers' precautions.
EARPLUGSGadgets for divers.
EARPLUGSSilencers?
EARPLUGSParental purchase for a rock concert?