Tone of Voice

I was thinking about innate versus societal human traits, and I'm wondering how we acquire certain societal traits. The one thing that instantly came to mind was why our tone of voice changes when we talk to different people. In general, I have four main tones of voice that I use on a regular basis: 1) A relaxed voice when I'm around people I'm comfortable with, 2) A guarded voice when I'm around people I'm intimidated by or trying to impress, 3) An "in love" voice when I'm talking to my boyfriend, and 4) An annoyed, disinterested voice when I'm with people I don't care about or am irritated by. So how did I obtain these voices?

When I'm talking to people I'm trying to impress, my voice gets rather low and my throat dries up. Is this an instinct, or am I reacting because of societal pressures? I think it's a combination. Since I am nervous, due to societal pressure, I react in a nervous fashion, which is my natural instinct. Not everyone reacts the same way when faced with someone who intimidates them. Maybe someone else's voice would be high and squeaky when talking to someone they fear.

So I can conclude that we form these voices from the way certain people and situations make us feel. In society, a professor is seen as a person who should be respected by his students, and therefore when talking to a professor, I feel the pressure to impress him, which makes me nervous and inevitably brings my voice into a lower register and dries out my throat. However, since I feel so emotionally close to my boyfriend, I sometimes talk to him in a sweeter voice because I see him as someone I can trust (which is a societal norm), and it makes my voice soften.