Sound Uncovered: An Interactive Book for the iPad

Explore the surprising side of sound with Sound Uncovered, an interactive collection from the Exploratorium featuring auditory illusions, acoustic phenomena, and other things that go bump, beep, boom, and vroom.

Hear with your eyes, see with your ears, test your hearing, make and modify recordings—this app puts you at the center of the experiment.

How do you make a saxophone growl? Are there secret messages in music played backward? Can you talk and listen at the same time? Why does the sound of gum chewing drive some people mad? Listen up and find answers to these questions and more as you take an auditory trip to the place where sound gets truly interesting: the space between your ears.

And it's free!

Download it at the iTunes App Store.