My workplace banned radio's, ipod's, and music devices. How can I prove that we need music in the workplace?

There was a safetly incident in the manufacturing plant concerning loud music and I feel that the saftey personel overreacted by banning all radios, headphones etc in both the plant and the offices. They even blocked streaming audio. I don't see how music in an office environment causes a safety concern. I think they just severly overreacted. Any ideas/research to prove that we need music? Increased productivity, increased moods... Please. I'm dieing. I can hear every phone conversation, pin drop, I even heard someones phone vibrate in their pocket two cubicles away!