Here’s Where Your Vocal Tone Comes From — Bobby Owsinski’s Music Production Blog:

It’s amazing how different each person’s voice can be from another, but also equally amazing how similar two people’s voices can be to each other. When recording a singer, it helps to know how his or her vocal tone is actually being produced in order to capture it more accurately. This great article by Jamie Ehrenfeld in Soundfly recently illustrates exactly how the body produces your vocal tone. Here’s an excerpt.

A Basic Guide to How the Human Voice Produces Resonance — Soundfly:

From the very first breath producing the initial cry that assures onlooking adults a newborn baby is healthy, humans phonate as a sign of life. Children produce sounds with their voices long before they develop the faculty to consciously alter how they’re doing so. We grow as expressive musical beings. And as we grow, we begin to hone the use of the voice as an instrument of musical and expressive communication.