Traditional sound machines tend to use white noise or repetitive nature sounds to compete with the cacophony of the outside, but that only works to a certain extent. Ecotones, by Silicon Valley start up ASTI, is hoping to one-up them by actually being able to adapt to the user's environment. You can choose from 12 different SoundStories—including settings, I bet, like ocean or rainforest—that play at 18-bit quality, better than standard CDs. Audio backgrounds react to cues in the listening space and combine them with hundreds of “natural” sounds to make a soundscape that's supposedly a lot more relaxing. It's available through Hammacher Schlemmer for $299. Wow, anything for a good night's rest, I guess? [Hammacher]