Google is working on a system that will listen to the existing microphone and serve you relevant ads based on the background noise. For example, you are browing the web and watching computer game show such as g4, you might see ads on your computer about computers games, xbox etc. it will record and identify the computer by using existing microphone on your PC.
Google already save tons of information such a keyword, websites you visit etc and now this.

they are behaving like a spyware but i am guessing since
Google is really big, they will never get that label.
Google i think need to stick to search engine only and they are really pushing it now. I hope people find ways to put a stop to this by building software that blocks
Google.