Loud "BOOM" interference when I touch audio cable

[LAS117]

Hi, I was subbing for a spin class instructor and when I tried to plug the audio cable in to my ipod there was a loud BOOM over the speakers. I thought it was a faulty ipod so I tried it with my android phone with the same results. There was another instructor there so I asked her to try (maybe it was me) and it worked fine for her, no BOOM. SO now I can't teach class b/c I am unable to touch the audio cable....any suggestions? There are no carpets in this room and there are 15 other instructors who do not have this problem, I guess I'm electrically charged?

 

[americanaudiophile]

Try turning the system volume all the way down (or to another input) before you connect the cable to your iPod or phone.