Neumann WS 47 Windscreen for D-01 Microphone (Black)Neumann's WS47 Windscreen for D 01 Microphone (Black) is an open cell polyurethane foam which attenuates close range sounds, wind, and fast movements of the microphone boom. The wind noise attenuation was measured without electrical filtering in a turbulent air stream traveling at 20 km h, generated by a noiseless wind machine. Designed to Fit The WS47 windscreen is specifically designed to fit D 01 microphones made by Neumann. Attenuation Wind noise