How can a piece of vinyl be carved in a way that perfectly mimics the sound of an individual person’s voice?

Question

I can sort of understand records mimicing the sound of instruments, but voices are so unique, how did we ever figure out the exact carving of a piece of vinyl that when you drag a needle across it, you’ll get the same sound as x or y person’s voice exactly?

In: Other

Answer 1

Sound is vibrations, vibrations move stuff, like a needle or your eardrums. A vibrating needle moving over a rotating vinyl disk will create indentations, or scratches in the disk, thus recording the sound, be it instruments, voices or anything else that creates vibrations.