What's the sound effect?

Question

Audio

Hello. Please tell me how such an effect is achieved, as with the phrase behind the scenes: ""This is a phenomenon known as deja vu"?
https://www.youtube.com/watch?v=aGAm7l_0DO8

It sounds like a 3D sound, but it's definitely not it. Often I've heard it in cinemas before, it looks like it's just mono, but it's not...
I can't understand, but I want to achieve it.

Answer 1

The phrase is pronounced twice and there are several sounds at the same time. It's not very clear what we are talking about ...
Maybe it's better to indicate the seconds? On the first repeat, reverb
is clearly audible .