I notice that it is an interesting point, to realize the personality type of a person, or guess their cognitive functions and overall qualities, using not their visual specifications but only their voice tone.
This thought got stronger as my EII sister sent to me a song by Marketa Irglova and without knowing who she is, I realized how much her voice is similar to my sister's, or lets say they similarly use their vocal cords. Only after that I searched for her online and found that her visual identification also matches EII, her role in the movie "once" was also an EII woman.
Then I remembered a photo I had found, while still interested in MBTI and it made sense (sorry I don't know how to make it bigger, open it in new tab):
don1.jpg
I think the photo represents a very incomplete and inaccurate version of the actual reality of things, but has a point and considering that the definition of cognitive functions in MBTI and information elements in socionics, are different, we should think of it in terms of socionics functions for it to make sense here.
another observation is that women of type ESE gasp in excitement when they are retelling something that has happened to them or around them. Their Fe and positivism and energy is clearly traceable in the way they speak. It is like they are provoking their "audience" to experience that excitement with them.
ESI and EII speak gently, ESI sounds like they are tired. both types are a bit jaded. SLI and LSE sound very sure of themselves, specially SLI, the tone is very "sure". SEE and IEE are playful. LSIs sound military.
Not only tone of voice, but also the way a person structures their sentences should be related to their information metabolism. The tone is the way you express your inner world to affect the outer world.
It would be good to hear other observations and opinions about this. Have you read any articles related to this?