http://vimeo.com/40047720

Amplifiear by Evan Clabots and Nonlinear Studio

Amplifiear is a simple analog amplifier for the iPad's external speaker (video). It snaps on to the iPad, bouncing sound from the rearward-facing speaker back toward the user. Amplifiear was designed by Evan Clabots of Brooklyn-based Nonlinear Studio. Clabots is raising funds for the project on Kickstarter.

http://www.kickstarter.com/projects/nonlinear/amplifiear-better-sound-for-the-new-ipad-and-ipad/widget/card.html