Flights From Belfast To London Why Do You REALLY Have To Turn Off IPods On Aeroplanes?

Why do you REALLY have to turn off iPods on aeroplanes? - flights from belfast to london

I was on a flight from Belfast to London recently, and despite a brief flight, I can do a lot and likes to audio books during the flight to hear. They told me keep your mouth shut, because it can interfere with pieces of the airplane! Sure, there is a transfer facility - So, what is the right answer?