Lucid Dreaming Question!!?

I can't become aware during a dream, no matter how hard I try. I want to experience a true lucid dream. So I've been thinking, what if I become lucid while in the dream by sending myself an audio message? What I mean is, I record myself saying "Are you in a dream?" and set it up so that it plays in 15 minute intervals, and put it as a song on my ipod, lasting about 2 hours, so it plays 8 times. I'll go to sleep with my headphones in, make sure the volume isn't too loud to the point where I will wake up, but loud enough so that it can interlace with my dream. The idea is that the audio plays, i hear it in my dream, become confused by its abruptness, and then realize that i am in a dream because i placed the question in my subconscious. By placing the question in my subconscious, I can do dream tests, realize I'm in a dream, and become lucid. Its an idea which I don't believe is well doented, so I thought I'd ask you guys, maybe some of you know a thing or two about this kind of subject. PLEASE ANSWER!