According to a report in The Register
, Google is developing a system that would listen in on a computer user's environment and match sounds with audio "fingerprints" in a database:
The idea is to use the existing PC microphone to listen to whatever is heard in the background, be it music, your phone going off or the TV turned down. The PC then identifies it, using fingerprinting, and then shows you relevant content, whether that's adverts or search results, or a chat room on the subject.
Great. Getting more search results without actually searching for them. This will allow me to find what I'm still not looking for.