Sorry but you can’t own a voice. You can sue if it is implied that a voice is you, but you can’t own the voice. If you could, you’d run into all kinds of problems. Imagine getting sued because your natural voice sounds too much like someone with more money and lawyers than you. Of if you happened to look like a celebrity/politician.
Ok, so how would that work? What does happen if you happen to sound like someone else? Who gets the rights to that voice?