I just noticed tonight that my mouse is emitting a digital or electric series of tones when the sensor is in use. When the mouse is sitting on the mousepad, the sound is a constant tone (I can't think of another term for it. It's not a buzz or a hiss or a beep). When I lift it, it stops. When I put the mouse back down or cover the sensor with my finger, I hear a series of three tones of different octaves (notes? they not full octaves, just higher and lower notes) and then it holds the last one.
At first, I thought it was my keyboard since I recently got a new cheapo wireless one, and actually, the keyboard is also emitting a noise from the side close to the mouse, but it's not the sound I noticed. The keyboard is making more of an electric whine or hiss, not quite as clear or loud as the mouse.
I have had the mouse for over a year and never noticed this, so it must be something new (I am sensitive to sounds like this). I rebooted my computer without the new, noisy keyboard attached (via wire or wireless), and even plugged the mouse into a different USB port to no avail.
Is this a mouse issue or a computer issue? I powered my PC off completely (not a reboot) and turned it back on. My computer is connected to a UPS, so it should not be interference from the wall power outlet. The only recent change is that keyboard; maybe it's not FCC compliant and interfered with something(?), but I have no idea what I'm talking about in that regard.
Anyway, what gives? Is this one of those communist sonic attacks I keep hearing about?