Meet the bassAware Drop: a wearable audio system that provides you with an immersive sound that you can actually feel. You can use it with your music player, tablet, and other devices. The Drop is lightweight, small, and battery powered. It has a tactile transducer on the upper back that lets you feel sounds. As you can see in the below video, the device looks like a backpack:
The Drop has two pockets for your phone, music player, and wallet. The 2600 mAh battery lasts you up to 20 hours. The above video gives you a better idea what the device has to offer.