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

Basically, to carve a record, you “read” on it forcefully, creating the grooves to be read back later. Just as a record informs the sound that speakers will play back later does the microphone inform the sound to be written.