NASA offers an explanation for the unusual sounds emanating from the Starliner spacecraft.

Mission Control received a pulsating sound from the Boeing Starliner speaker, as reported by astronaut Butch Wilmore.

NASA offers an explanation for the unusual sounds emanating from the Starliner spacecraft.
NASA offers an explanation for the unusual sounds emanating from the Starliner spacecraft.

NASA has solved the mystery behind the "strange noise" heard by an astronaut on the Boeing Starliner spacecraft while aboard the International Space Station.

On Saturday, just days before the spacecraft was set to leave the station and return to Earth on autopilot, Mission Control at Johnson Space Center in Houston received a report from astronaut Butch Wilmore about a pulsating sound coming from a speaker inside the spacecraft.

NASA has determined that the pulsing sound from the speaker on the Starliner spacecraft was caused by an audio configuration issue between the space station and the spacecraft.

"NASA stated that the space station audio system is intricate, enabling various spacecraft and modules to be linked, and it is typical to encounter noise and feedback. The crew is instructed to contact mission control if they hear sounds emanating from the comm system. The speaker feedback reported by Wilmore does not affect the crew, Starliner, or station operations, including Starliner's uncrewed departure from the station no earlier than Friday, Sept. 6."

Butch Wilmore and Suni Williams
NASA’s Boeing Crew Flight Test astronauts Butch Wilmore and Suni Williams pose on June 13 from inside the vestibule between the forward port on the International Space Station’s Harmony module and Boeing’s Starliner spacecraft. The astronauts have been stuck in space since June. (NASA)

The pulsating sound mystery arises as Starliner is set to undock from the space station without any crew and attempt an autonomous return landing in the New Mexico desert.

Boeing-Astronaut Launch
Boeing's Starliner spacecraft is docked to the Harmony module of the International Space Station on July 3 as seen from a window on the SpaceX Dragon Endeavour spacecraft docked to an adjacent port. (NASA via AP)

Astronauts Wilmore and Suni Williams, who have been on the space station since June, will remain in space until February after NASA deemed it too risky to bring the experienced pilots back to Earth on Starliner. The current plan is to bring the astronauts back in a SpaceX capsule.

The weeklong trip for the astronauts was originally planned, but the mission has been hindered by thruster failures and helium leaks.

The balloon-shaped Starliner spacecraft is docked to the Harmony module of the International Space Station high above Egypt's Mediterranean coast.
NASA said the mysterious pulsating noise was the result of an audio configuration between Starliner and the International Space Station. (NASA via AP, File)

The first crew trip of Starliner was expected by Boeing to revive the spacecraft program, which had faced years of delays and rising costs. Despite recent thruster tests in space and on the ground, the company maintained that Starliner was safe.

This report was contributed to by Bradford Betz of Planet Chronicle Digital and The Associated Press.

by Stephen Sorace

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