Ear plugs with frames consist of ready-shaped plugs attached to a frame. In many types, the frame can be worn at the back of the neck, on the head or under the chin. Ear plugs with frames are particularly suited where the ear protection has to be frequently removed and replaced.
If they are not worn correctly, the minimum sound insulation level is not reached, so ear plugs with frames should not be used at noise levels above 90 dB. Sounds transmitted into the ear via the frame – by contact with the hands, for example – can sometimes cause an unpleasant sensation.