On Saturday (Aug. 31) NASA astronaut Butch Wilmore noticed something weird inside the Starliner spacecraft.

Wilmore radioed down to Mission Control to ask about the bizarre noises heard emanating from Starliner‘s speakers while the spacecraft is currently docked to the International Space Station (ISS).

“There’s a strange noise coming through the speaker,” Wilmore tells Mission Control “I don’t know what’s making it.”

Wilmore then holds a device to the speakers, allowing Mission Control to hear the pulsating sound occurring at regular intervals.

Mission Control at Johnson Space Center in Houston likens the sound to a “pulsing noise, almost like a sonar ping.”

Sounding rather relaxed, and unfazed by the whole situation, Wilmore replied “All right, over to you, call us if you figure it out.” Mission Control then informs Wilmore that the recording will be passed along to the team and they’ll let him know what they find.

Former Canadian astronaut Chris Hadfield commented on the situation in a post on X. In the post, you can hear the strange sound reported by Wilmore.

From Space.com

There are several noises I’d prefer not to hear inside my spaceship, including this one that @Boeing Starliner is now making. pic.twitter.com/NMMPMo5dtt

— Chris Hadfield (@Cmdr_Hadfield) September 1, 2024