what is the purpose for our natural voice
As explained by the Art of Manliness, you can identify your voice's mask by closing your lips and generating a casual mmhmm sound. As you do this, you'll feel a slight vibration in the area of your face between your upper lip and nose. This will help you find your natural pitch and tone, what's known as the mask area. It's also much better than trying to force a deeper tone by speaking from the throat: When you speak from your lower throat to get that low pitch, you produce a sound that lacks carrying power. Try speaking with an artificially lowered pitch again. Go as low as you can, but speak as loud as you can.