I found some graphs showing normal human hearing treshold.

By the way, giving points for every vowel or consonant that is guessed correctly isn't overestimating your speech discrimination percentage since there is no other way to determine how well a person can understand speech. If audis did not give points in this manner, results would be inaccurate not to mention significantly lower than they would be if they did not give partial credit for accurate guesses.
 
Pre implant i didnt have tinnitus but after my implant, in the last couple of years i have started getting tinnitus, its mostly at night and at hearing tests
 
I hear 4 different sounds due to my tinnitus. I had mild tinnitus pre-CI, but after CI surgery, it is now mild-moderate. I don't mind though. I can hear very well with my CIs and that's what counts.
 
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