This is from a fan audio recording of the 1967 doctor who episode "tomb of the cybermen". The sound is now in the public domain. In 1967, these cybermen were voiced by peter hawkins using a vocoder or an electro-larynx, a device used to restore speech to those whose vocal cords are damaged by detecting vibrations of the throat. At the very end of part 2 of "tomb of the cybermen", the cyberman controller is awakened and says "you belong to us, you shall be like us!" to the cast.
Author: Chungusa