Just like tweet (the name of the messages of the Twitter social network) refer to the sound made by a young bird, Chirp is the name received by the sounds make by the majority of birds, but also a high intensity radar pulse.
And thanks to this Compressed High Intensity Radar Pulse it is possible to share files between two iPhones with the application installed.
Share files between two iPhones by means of sounds.
Original application to transfer files
With Chirp you can send and receive files (links, notes or even, photographs) on your iPhone without any need of Bluetooth. It will only be necessary for one device to be near the other device with Chirp installed. Works in noisy places!
There are many applications to share files from an iPhone but, beyond any doubt, Chirp and its sound transmission system is the most original one. Download Chirp free for iPhone.