my ipad sound is very distorted since I upgraded to ios 7.03

My sound has become terribly distorted since I wirelessly upgraded my ipad (the "new" ipad) to ios 7.03 this afternoon.. My sound is very important to me, because of a visual disablity. I use my ipad mainly for podcasts and audiobooks. Other than that, I use the narrator feature most of the time. I am really hindered by the voices being too distorted to listen to. Please advise. thanks.😕