A push-in earplug (100) including an elongate core (110) and outer layer (120) is disclosed. The outer layer includes a sound attenuating portion (121) having a first average density and a stem portion (122) having a second average density, and the second average density is greater than the first average density.
申请公布号
AU2013290178(B2)
申请公布日期
2016.08.04
申请号
AU20130290178
申请日期
2013.07.11
申请人
3M INNOVATIVE PROPERTIES COMPANY
发明人
ENDLE, JAMES P.;HAMER, JEFFREY L.;SEVILLE, ALAN R.;TEETERS, KENNETH F.
