The Mic-Muff has been tested and used in a variety of applications. Typically, the Mic-Muff will provide up to 20db of wind noise reduction in a 20 MPH wind with virtually no negative effect on frequency response. Mic-Muff h is an American-made fitted fur windscreen that provides high-quality wind protection for portable audio recorders at an affordable price. The Mic Muff features a 3/4" fur length for maximum wind diffusion. The Mic-Muff is acoustically transparent and won't degrade microphone performance.