If you are asking this question, or researching it everywhere then you are truly serious with your career of voice artist or vocal performer.
My dear singer, I know very well that you always embrace this question. Being a singer, I faced this too in my early days. So, here I am, disclosing some key facts, I have researched to feed my anxiety with my true question within.
"How to know my voice ?"
I found three facts I need to bother to answer myself.
My vocal range
My Prima Voce
I checked my throat externally with my right hand thumb and index. I gently touched the bump apparently shown in my throat section. I found it a bit hard. This is called voice box or larynx. This is located at the upper end of wind pipe. I think a small bone structure at the region too. This is called Hyoid Bone.