In the majority of noise reduction plug-in is protected from too loud sound with a material made out of soft rubber and plastic that fit into the ear hole, and also reduces the sound of not less than 3 DB(a)
In the earplugs A device which prevents the sound is too loud. The material is made of soft rubber and plastic that fits within the ear and the sound reduction of at least 15 decibels.
In the part of the plug to reduce noise. A protective devices from sounds too loud. The materials made from rubber and plastic light that fit with the auditory canal and also reduce noise is less than 15 DBA.