I could not figure out where this was coming from as I have not visited any adult sites on my system as I learned that lesson a long time ago. I discovered a post form a user that had a similar problem and what they wound up doing was to replace the useenglishbig.gvp file. They had copied the file from FS2009 to FSX . So I figured what did i have to loose. the first thing i did was to move the original file to my desktop for safe keeping. and than I copied the file to my FSX ATC folder which is where the original file was. It worked like a champ i no longer hear unwanted sounds the only thing I had to do after making the switch was to select a voice to use with ATC as there was non set so i never heard anything I said to ATC . That had me concerned for a while but now it works great
I hope others may find this useful.
