> "a patent held by the company states that the Facebook app uses voice recognition algorithm, which uses audio recorded by the microphones, to modify the ranking scores of stories in users News Feed.

Does the patent really state that Facebook does that, or Facebook spammed the patent office with obvious ideas about how they could do that. Big tech companies have loads of trivial patents on stuff they have no firm plans to build, just to stake out IP territory.

> I believe they claimed it it was so they could recognize the music you were listening to, and know something about your mood.

When did this happen, and why wasn't it frontpage on HN and all the news sites?