I did notice recently that if you launch Facebook and put your ear to the bottom of your iPhone you can hear that the audio is on (white noise like when turning

I did notice recently that if you launch Facebook and put your ear to the bottom of your iPhone you can hear that the audio is on (white noise like when turning volume way up on a stereo that isn't playing. Just now I confirmed that's happening and then home-screened to bail out, and after a second or two the white noise stops. Seems like it should be pretty easy to do similar experiments aimed at proving the OP's hypothesis. [Edit: I tried the same experiment after playing videos, etc. Speaker still sounds like it loses power after bouncing back to the home screen... so while there might be games being played with regard to the app's activity and battery usage... I'm not really compelled by the specific hypothesis put forth in this article as to how] [Edit: Of course, still begs the question "Why is the speaker getting power at all?". I haven't found other apps that appear to do this.]