The recording, released by a defense website, comes from a National Oceanic and Atmospheric Administration recorder that was monitoring the area at the time.

Investigators have released a clip they think shows the final moments of the doomed vessel A newly released audio recording is believed to have captured the very final moments of the doomed Titan submersible when it imploded deep in the Atlantic Ocean in 2023.

The sound of the implosion was captured on June 18, 2023 by a moored passive acoustic recorder roughly 900 miles away from the deadly event. The brief clip begins with a few moments of relative silence before a deep, sustained rumbling that nears 400 Hz, according to an accompanying frequency graph.