Thus far, the researchers have already developed an acoustrument that integrates with a phone case and acts as a camera shutter, one that acts as an alarm controller, another that turns a phone into a toy car and one that transforms a device into an interactive doll. They believe the accessories can be especially useful whenever you don't have access to the touch screen, such as when you're using your phone as a virtual reality device (like in the picture above). We doubt we'll see acoustruments being sold on Amazon or elsewhere anytime soon, but the good news is that they're reportedly cheap to manufacture. Hopefully, that means they're also affordable if they do come out, so you can try the curious controllers without breaking the bank.