Flexield Noise Suppression Sheets TDK Flexield Noise Suppression Sheets (shields) are thin, flexible sheets utilizing TDK's state-of-the-art magnetic materials and manufacturing expertise. These features, combined with various thicknesses and hybrid materials, which implement metallic layers, enable Flexields to provide EMI noise suppression over a wide range of frequencies with varying attenuation values. Another benefit of TDK Flexield Noise Suppression Sheets is that these sheets can easily be cut to size and shape as needed to fit in the available space.