Can you hear noises from the real world in your dreams? I had an idea for a lucid dreaming technique but it dont know whether it would work.

The idea is that you make an audio file that bleeps every ten minutes or so, with silence in between. You then wake up during an REM period, then go back to sleep, listening to this audio file through an mp3 player or ipod. The basic idea is that you hear the bleep in your dream and realise you're dreaming.

Would you hear the bleep? Would it wake you up? I'm interested to know what people think before trying it.