Undated handout image of Submersible Titan. On June 18, 2023, the submersible vanished on expedition to the Titanic wreckage.

When the Titan submersible imploded, scientists were able to capture audio of the event. Here's how they could do that and what the gear is normally used for.

The brief, staticky recording includes a loud noise that sounds somewhat like an underwater thunderclap, then goes silent.