I have a coworker who is receiving Morse on his Latitude D830. Well, it sounds like Morse - about two seconds of dots and dashes, very loud, randomly throughout the day. I just heard it a few minutes ago. He has an iPhone, which may possibly be the source. I swapped his hard drive into another laptop to eliminate any possibility of audio hardware malfunction, as well as running a full diagnostic, which passed. Anyone ever hear of such a thing?