That's actually a true quote. Just phrased poorly by the AI. Anechoic chambers aim to block sound reflections. Hellen keller did go there and said it felt like true silence because she was used to feeling sound cause internal rumbling sensations. But with no reflection you couldn't feel anything from the sounds
Language has no equivalent for the absolute physical silence that burst upon me in that fantastic, baffling chamber. […] I have known many kinds of silence—the silence of early morning, the silence of remote mountain summits, the silence of gently falling snow. […] Shut in by floor, ceiling, and walls of fiberglass, I throbbed with the silence of the dead and the silence that covers buried peoples and ages without a history.