Here is a neat technology that provides you with an acoustically-driven method to interact with your smartphone. Acoustruments are passive, powerless mechanisms made from plastic that let you get a more interactive experience while using your smartphone. The idea was inspired by wind instruments. One end of the instrument attaches to the microphone while the other connects to the speaker.
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Acoustruments: Passive, Acoustically-Driven, Interactive Controls for Handheld Devices
As you can see in the above video, such a technology can be used to develop smart cases, toys, and even interactive dolls. Yet another fascinating idea from DisneyResearchHub.
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