If you can't control the volume on the radio station, and you can barely make out what they are saying, it's your speakers picking up some radio frequency. It happens from time to time and the only thing you can do is play music over it or get better speakers.

If you can control the volume, figure out what station it is, see if it happens on other browsers, etc...

Hello. Thank you very much for your reply. I can adjust the volume, but I have no idea what station it might be. There's only one real talk radio station in this town (Macon, GA), and the hosts are very recognizable, so I know it's not that station. Surely it's not one of those satellite services! It does also happen on Internet Explorer. It's not constant, thank goodness, so sometimes I can watch a video or something. Well, any help that you can offer would be very much appreciated!