http://blueyetipopfilter.com/go Pop filters, oftentimes known as pop shields get rid of the blasts and pops that are created when singing or speaking words that have the B and P sounds. Plosives is the name given to the pops and blasts that are bothersome especially when heard over the mic . A pop shield functions by creating a barrier in the middle of the mouth and the mic to get rid plosives. It also aids in protecting a mic from decay by absorbing moisture coming from a singer's mouth.