Originally Posted by mountaindewmi
I think I know what you mean, the sound is like a short buzz or "Donk" sound. I sometimes get it when I first click on the pad or when I swipe up to close an app.
The only thing I can think of that I did was installing the increase sound patch and later removed the patch. It started after that.
I got this after going through various patches, although I didn't install the sound patch. It went away for me after a few reboots.
To the OP, you may have abnormally good hearing and can hear the white noise speakers make when they're activated, try it with some other devices, see if you hear the same buzz, if not, call HP and get a replacement.
Sent from my Sensation using XDA App