I don't know of a specific disorder, although I wouldn't be surprised. In learning Russian, I am having a devil of a time figuring out the proper vowels when I hear a word. Is it o, or a, is it ya, ye or yo, ir it i or oi? yet, constanants, I have no trouble with. So, if there is a real disorder, it wouldn't surprise me considering that it's not all that easy. [I'm functionally deaf in one ear (left - its a 'tin ear') and the good ear only goes up to 5000 Hertz, and Russian, being a language with a humungous range, I believe from 100 hrz up to 9000 hrz, I am probably missing out on a good portion of it. Compare it to French, which uses all of the subtlties between 1000 and 2000 hertz, if I remember correctly, and that's it. ***********Kenneth Udu