An electrically conductive shield, or Faraday cage, is typically used to keep EM waves radiated by a source from affecting critical circuits. Since a Faraday cage is approximately 100% reflective, EM waves can reflect and potentially disturb other components within the shielded space. To mitigate that, and EMI absorption material is typically added to the inside of the shield. This material will reduce reflections by absorbing the EM energy which is then converted to heat.