Not annoying to me, because I don't have a voice that comes on when I make or receive a call (unless I'm in a car and "driving" mode activates). Not sure what you've activated to get this.
Sent from my Droid Turbo
Check and see in setting, sound,"network lost tone" if that is checked try unchecking it.
Also try unchecking all of those tone things in that area. ( if Checked )