Pop filter

A pop filter or pop shield is an anti-pop noise protection filter for microphones, typically used in a recording studio. It serves to reduce or eliminate 'popping' sounds caused by the mechanical impact of fast moving air on the microphone during recorded speech and singing. It also keeps moisture off the microphone which can cause mold growth. Additionally, a pop filter can protect against the accumulation of saliva on the microphone element. Salts in human saliva are corrosive and thus use of a pop filter may improve the life of the microphone.