The implosion killed all five people on board - Titan operator Stockton Rush, who founded Oceangate, the company that owned the submersible; two members of a prominent Pakistani family, Shahzada Dawood and his son Suleman; British adventurer Hamish Harding; and Titanic expert and the sub's pilot Paul-Henri Nargeolet.
A coastguard panel investigating the disaster heard two weeks of testimony last September, which saw a former OceanGate scientific director say the Titan malfunctioned during a dive just a few days before it imploded.
The coastguard said the audio clip "records the suspected acoustic signature of the Titan submersible implosion" on 18 June 2023.
A recording has captured the implosion of the Titan submersible which went missing on its voyage to the wreck of the Titanic.
A passive acoustic recorder located around 900 miles from the implosion site picked up the sound, US Coast Guard officials said in a statement.
