I found a program called EzyTuner that says:
I’ve been trying it out and it seems to be pretty good. I’m not sure what a fourier thingie is, but the program that I downloaded which said it did them came bundled with spyware, the bastards. Anyway, here is what i’ve been able to deduce from EzyTuner.
My highest is a G# in the third octave at a frequency of 1568Hz and my lowest is a G# in the 5th octave at 386Hz. I’m not sure it was registering my lowest properly, though, because at what I felt to be my deepest the needle didn’t move at all. My normal speaking voice, as far as I can tell, is a C# in the third octave.
What can I compare this to?