In many professional recording studios, I always see this attached to their microphone :

What is the purpose of the thin black sheet separating the source of the voice and the microphone?
In many professional recording studios, I always see this attached to their microphone :

What is the purpose of the thin black sheet separating the source of the voice and the microphone?
It's called pop filter, pop shield, or anti-pop. It protects the microphone from things like fast moving air and saliva. Its main function is to attenuate the aspirated plosives of the singer, which can produce noise and strong ugly transients.