Interesting uses for audio

The web site has an interesting article on using audio for interesting applications. Briefly,

  • Google Chromecast has a guest mode, that allows your friends to cast to your Chromecast from an Android phone without connecting to your WiFi network. The system sends out a special audio handshaking signal from your TV speakers that can be heard by your friend’s Android phone.
  • A UK company called Chirp lets you send data to a nearby device using sound. From the Chirp web site: “Unlike Bluetooth, Chirp doesn’t require you to pair devices. Unlike email, you don’t need to type in anyone’s address. Unlike instant messaging clients, you don’t have to add recipients from a buddy list. And so on. To share stuff, you don’t need to be friends on Facebook, or to follow each other on Twitter, or be connected on LinkedIn. None of that is needed. Just press the big yellow Chirp button, and anyone running the app can ‘hear’ the data.”
  • uses audio signals for proximity based marketing, which is the distribution of content associated with a particular location.
  • uses ultrasound to create feeling directly on your hands.


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