Never seen it before myself.
Curious if its ad related in some fashion. You could try "Air Push Detector" in the market to see if it comes up with any offenders.
Let me add a few more details. This phone is brand new.(5 days old) there are no devices connected to it wired or wireless. Also I only have about 10 apps installed.
Sent from my HTC Sensation 4G using DroidForums
You have Hearing Aid amplification enabled. Go to settings --> Call --> and remove the checkmark from hearing aids. This is where the setting is on the Rezound. YMMV.
JuopunutBear S-OFF April 21, 2012