I don't have any ringing ear symptoms, but I can tell you that my holistic Dr does NOT want me to have ANY artificial sweeteners at all. He said if I HAVE to have soda, to have the REAL thing and not the fake stuff.
I've been off of fake items for about 3 months and I feel wonderful. I am so glad to be off of them too because the chemicals just aren't good for your body---not matter what you weigh.
I am not even allowed to chew sugarfree gum....in fact no gum whatsoever because it realeases the mercury from my fillings in my teeth. I never thought I could give up milk or gum, but I've done both.
It's amazing once you visit a holistic Dr and they tell you what all these chemicals and things can do to your body. I've learned so much in the past 8 months.
Also, back to the soda thing---did you know that your liver is what processes sugars and if you put the real thing in (say real soda) versus diet soda that your liver processes it the same way? Meaning that if your body is apt to hold onto fat, that it will still hold onto fat because your liver processes it the same as regular sugar. I found that very interesting.
Feel better with your ear ringing
---I've never had the problem so can't really help you much.