Barry Wilmore asked NASA's ground crew for help with a repetitive knocking sound coming from the Boeing Starliner, asking to configure their call to demonstrate the noise.
The sound was described as "almost like a sonar ping" by an Earthside crew member, despite both Wilmore and the NASA team appearing unconcerned about the situation.
The mysterious noise might have a mundane explanation related to feedback loops, as speculated by users on platforms like Reddit.
Boeing's Starliner is set to undock for an automated return to Earth on September 6th, leaving astronauts Wilmore and Sunita Williams on the ISS until early next year.
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