The newest Premium Content in the Sims 3 Store “Sharper Sim’s Super Sleeper”, comes with options to allow your Sim to sleep in a “futuristic” way with four options of musical tones to listen to while sleeping.
You cannot change the sounds once your sim sleeps, so you will have to change it before they sleep each time. Below are two screens of the options available & a video showcasing it, along with the guitar & Video Arcade Game that comes in the Set as well.
Here is the video showcasing the items in the new Set. Sorry for the low-quality video peeps, I’m at work right now and this computer is terrible for gaming. 😛 (Maybe I’ll upload a better one with screens later)