My boss had mentioned strange noises coming from my workroom while I was out on call. Muffled voices to be precise.

I didn't have a funky screensaver or anything, so I suspected a virus. I scanned and couldn't find a virus. I couldn't even find a WAV file, an MP3 file, or an RA file with muffled voices. It was a shop mystery for weeks. I joked that we had a ghost.

Eventually I heard the a mysterious voice too. A man's voice came from my computer speakers. It only last a second, so the time I turned to my machine the voice had gone. Nobody else was in the shop, so the chances of someone playing a joke on me were pretty slim.

From then on I'd hear the voice about once a week, but by the time I turned to check my computer the voice was gone. It had to be some sort of practical joke... right?

One day I had uplugged our test speaker's from a customer's computer. A few minutes those computer-less speakers spoke to me! The audio cord was still dangling from the shelf!

That's about the time that I figured out what the voices were. There are a lot of truckers around here. Some have beefed up CB radios, which are evidently powerful enough to be picked up with my cheapo Labtec speakers.

Mystery solved. Where's my Scooby snack?