White Noise Era

The apocalypse has come, and everything has lost its voice. "Echo" - a phenomenon of information annihilation from unknown dimensions, is slowly swallowing the entire world. It transforms into endless mycelium, covering the city and eroding the earth. The eroded object will completely disappear, along with all traces and memories of its existence. And the continuous low-frequency buzzing is the sound of it eating. Humans call it "white noise." When the world itself is erasing "existence", how can you prove that you have survived?