▎ 摘　　要

NOVELTY - A noise reduction earplug comprises a shell (1) comprising a substrate and a graphene coating coated on outer side of substrate. The inner portion of shell is filled with sound absorbing material (2). USE - Noise reduction earplug. ADVANTAGE - The earplug improves easy aging and deformation of traditional noise reducing earplug, and provides possible graphene thin film material in daily life. DESCRIPTION OF DRAWING(S) - The drawing shows a main view of noise reduction earplug. Shell (1) Sound absorbing material (2)