Ever since the latest update my phone has been doing some short variation of my notification ringtone. I use the "look at me ringtone" for text messaging and default sound for my notes. However often times now it I will set it down screen off and I'll hear a fraction of what I would think is the sound for a notification. If the sound wave was maybe a second or so long this would be 1/4 of it just enough to know a sound came from the phone.
However I see no new displays although the only thing i'm seeing is a keyboard looking icon in the top left hand corner. Could this be a reason for the noise but for whatever reason its not playing the whole noise? I haven't had this problem before the update and now its kind of annoying...