This would be most effective if you were able to make it into a dream sign and not just as a tool to get you to RC alot. Look at it this way. If it gets you to RC during the day because you hear the beat in your head, but you don't hear that beat during your dream, will you RC while asleep? Probably not, like Mad World said.

Otherwise, if it works for you, it sounds like a really neat idea and I like it. Here. Read this on dream signs by ninja. Combining two techniques is often the most effective tool.