Ear Plugs:

An earplug is
a device that is meant to be inserted in the ear canal to protect the
user's ears from loud noises or the intrusion of water, foreign bodies, dust or
excessive wind.



There are mainly four types of earplugs for hearing
protection:



·        
Foam earplugs, mainly made from either
polyvinyl chloride (PVC) or polyurethane (PU) (memory foam), which are
compressed (rolled) and put into the ear canal, where they expand to plug it



·        
Silicone earplugs, which are rolled into a
ball and carefully molded to fit over the external portion of the ear canal



·        
Flanged earplugs, including most types of
musicians' or 'Hi-Fi' earplugs.



Custom molded earplugs, made from a mold of
the wearer's ear and designed to precisely fit all ear canal shapes. Custom
molded is further divided into laboratory-made and "formed in place"

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