A small cap worn over the fingertip for protection
[DOC] [TLE] Hearing Protectors : OSH Answers [PAR] People should wear a hearing protector if the noise or sound level at the ... Semi-
insert ear plugs which consist of two ear plugs held over the ends of the ear canal 
... small and easily carried; convenient to use with other personal protection ... 
dirty fingers, can introduce dirt and bacteria into the ears, causing ear infections.