Has this been done?

So i was reading some random posts about bineural beats and i noticed that lots of people still hear the music in their ears when they are dreaming, that gave me an idea.

Basically record yourself saying "do a reality check" or "Am i dreaming?" or something along those lines. Put it on an mp3 player so it repeats then listen to it as you fall asleep.
It seems you are more likely to hear it if the volume is more-than-quiet.

Technically if im right you would hear that in your dream and (hopefully) it would make you aware of your state.

Anyways tell me what you think or if somebody has already suggested this.

Feel free to try it and post the results here because i most likely wont have time to do it myself for a few days.

This has been suggested, of course, what hasn't with anything? But it would definitely work, especially being your own voice. The problem would be getting used to falling asleep with yourself repeating this, and adjusting the volume to what fits best.

Make it an alarm and set it alarm like 5 times during the night?

Yup, I have actually done it before. It worked after the 5th attempt, but I have never had much success with it (Or any sounds) personally.

I've tried it but it didn't work for me. At first I set it too high so I couldn't sleep, then when I set it lower I fell asleep normally, but I didn't hear it in the dream. I did this for a couple of days to try it again and only heard it once in this time, but what the voice said was different, or altered. I didn't notice it.

If you have an iPhone, not sure if on android their is an app called dream control for 0.99 that you can set it to say something like "do a reality check" or "you are dreaming" every hour. I used to have it but it never really worked well for me but others could have different results because I'm a very deep sleeper and think that might cause me not to hear it in my dream