I haven't practiced speaking in a more feminine voice very much, but I am a semi-competent singer so I have some sort of idea of what I'm doing. I also sound nervous in the recordings, which is a mixture of me not knowing what to say and the fact that there's other people in the house. They all know that I'm trans, but I probably sound a bit silly talking to myself.
The first one is just me speaking in my everyday voice. I naturally have a pretty deep voice (sits around 100hz), and have about three octaves of range in my modal register.
http://vocaroo.com/i/s1ZFBD8oGE7fThe second is near the top of my range, or at least as high as I can get before I have to belt. Belting is way to loud for talking though. It worries me that's is so high up in my range because my speech may be squished pitch wise. It's about 200hz.
http://vocaroo.com/i/s09XHHzzRE6vThe last one I'm straining my voice but it gets me 50hz higher. I don't really want to talk in this voice since it will hurt in the long run, and it sounds strained. On a side note I say "215" but I mean 250.
http://vocaroo.com/i/s1CamjqGbJJR