Phasmophobia is a co-op horror game released in early access in 2020 by Kinetic Games, where investigators use tools like the Spirit Box to communicate with ghosts. The device scans radio frequencies and plays fragmented voice responses, which became one of the game's most recognisable sounds. Clips of those responses spread quickly through Twitch streams, YouTube hunts and TikTok edits as players shared their scariest sessions. This third radio voice variant is still shared because it instantly signals a paranormal encounter, even to viewers who have never played.