Science+fact+file

I am reading this magazein called the helix here is some of it's content: How to win a sing star Have you ever wondered how your games console works out if your singing voice is actually in tune with the song you're singing? Knowing how sound works can help you to understand the game and max out your score. did you know? radio waves travel so much faster then sound waves that are broadcast voice can be heard sooner 18 000 kilometers away then in the back of the room in which it originated.
 * SCIENCE FACT FILE  **