The next moment a hideous, grinding screech, as of some monstrous machine running without oil, burst from the big telescreen at the end of the room. It was a noise that set one's
teeth on edge and bristled the hair at the back of one's neck. The Hate had started.
As usual, the face of Emmanuel Goldstein, the Enemy of the People, had flashed onto
the screen. There were
hisses here and there among the audience. The little sandy-haired
woman gave a squeak of mingled fear and disgust. Goldstein was the renegade and backslider
who once, long ago, had been one of the leading figures of the Party...

how is imagery used in this passage