Schoeps W 5, 3.5" Solid Foam Ball for Omni CapsulesSchoeps W 5, 3. 5" Solid Foam Ball for Omni Capsules Acoustic foam windscreen, especially for use with omnidirectional microphones in wind. Usable as a low cost alternative to popscreens when greater efficiency is needed. With pressure gradient transducers it can be used in light wind only, but it offers the advantage that its influence on sound and polar pattern is minimal, especially at low frequencies.