I don't agree. After reading about this a year or so ago, I took a BCS Tracker and an Ortovox beacon out in the yard and tested them out. My findings were that the transmit mode is not affected by an iPod that is playing music. However the search function on both beacons was distorted when the searcher had an ipod playing and the ipod was too close to the search beacon. Sometimes it was a large distortion sometimes just a little. I did not test for mobile phone interference.
The lesson I took away from this was if you are searching you better have the ipod turned off, something that could be easily overlooked in the aftermath of an avy with your buddy buried.
Thanks akstormin for clearing that up, that is what i meant to say the first time. If you do listen to music or have your phone on or any electrical device you must turn it off before you use them to search.... But my question is that if someone gets buried and has an ipod playing, wont that interfere with those trying to use the search feature to find this person?