Pop shield
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A pop shield is anti-pop noise protection filter for microphones, normally composed of an acoustically semi-transparent material such as woven nylon stretched over a circular former, and often including a clamp and a flexible mounting bracket.
The pop shield is especially designed to attenuate the energy of plosives such as the expression of the letter P in a spoken or sung word, which otherwise might exceed the design input capacity of a microphone, leading to clipping.