The spirit box is a piece of ghost-hunting equipment in Phasmophobia, the co-op horror game released in early access by Kinetic Games in 2020. Players ask the ghost questions through it, and certain ghost types answer with short bursts of distorted, radio-like speech. Clips of these replies spread through Twitch streams and YouTube investigation videos, becoming shorthand for paranormal proof in memes. Like the Fears to Fathom notification sound, it now shows up in horror edits far beyond the game itself, because that crackling voice instantly signals that something unseen is present.