I don't know if this has anything to do with upgrading to OS X Mavericks 10.9 but since i have every time I have yahoo open these audio ads play and some play at the same time as one another. It is driving me nuts. I'm using google chrome. It did this in the middle of the night and I thought someone broke into our home. We heard voices and didn't realize at first that it was coming from our iMac which was in another room. Is there any way to find out how I can remove this issue? Thanks in advance.