Neumann PS 20 A PopscreenThe Neumann PS 20 a Popscreen provides suppression of so called pop noise, such as "p" or "t" when used with vocal microphones. Commonly knows as a pop filter, the unit consists of a thin frame measuring 7. 9" in diameter and covered with black gauze on both sides. A 12" gooseneck allows for precise positioning. The PS 20 uses a clamp with a knurled screw to attach to mic stands.