Phasmophobia is a co-operative ghost hunting game by Kinetic Games that launched in early access in 2020, where players use tools like the EMF reader to identify the haunting spirit. An EMF 5 reading is one of the evidence types needed to narrow down the ghost, and higher tier readers give clearer, faster signals. Clips of hunts spread widely through Twitch and YouTube, turning the reader's beeps into a shorthand for danger among horror fans. The loop remains popular in edits and soundboards because it instantly signals that something unseen is close.