Recently i have installed a Stereo system in my car, that works flawlessly when i play Music and Videos through an SD card or Pen drive, The problem comes when i am listening to FM radio, My Stereo system plays buzzing sounds when i pass near to High tension cables, power lines in local areas, near to transformers , when i press any buttons/switches on dashboard of my car and also when i turn on windscreen wipers. I have been noticing this from a while, and come to conclude that EMI is the real culprit!
How can i get rid with this problem.? should i add Ferrite bead to coaxial cable of FM antenna.?