Abstract: A mobile device for exchanging user profiles with other mobile devices, the mobile device comprising a microphone for listening to ambient sounds, a speaker for producing sounds, a memory for storing a first user profile describing a first user of the mobile device, and a processor operable to control the microphone, the speaker, and the memory, the processor being further operable to transform the first user profile into a first sound pattern, broadcast the first sound pattern using the speaker, and detect, using the microphone, any second sound pattern produced by a second mobile device and comprising an indication that the first user profile and a user profile of a second user of said second mobile device are a match.

Abstract: A system, method, device and interface for rendering information including the acts of capturing ambient information, determining whether one or more distinguishing patterns is present in the captured ambient information, accessing user profile information, requesting content information when it is determined that the captured one or more distinguishing patterns is present in the captured ambient information, and rendering the requested content information.