A recent study by Bridge Ratings & Research found just eight percent of radio listeners who have owned an MP3 player for more than six months listen to radio less. While those who have recently bought an MP3 player do, certainly listen to less radio as they get comfortable with their new music source, the study suggest MP3 is not a radio killer. However, for the 12-18 demo, it may be. After owning an MP3 player for six months, 45 percent 12-18 year olds listen to radio less.