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it home reported on september 3 that the national aeronautics and space administration (nasa) said in a statement on monday that it has confirmed that the mysterious "pulsing sound" coming from boeing's starliner spacecraft was caused by speaker "feedback" and the spacecraft is still scheduled to return to earth on friday.

nasa said that this speaker feedback is due to the audio configuration between the space station and the interstellar passenger spacecraft. the audio system of the international space station is very complex, allowing multiple spacecraft and modules to be interconnected, so feedback noise often occurs. the statement also stated that the "pulse sound" has now stopped.

nasa said, "crew members need to contact mission control if they hear sounds coming from the communications system. the speaker feedback reported by wilmore has no technical impact on the crew, starliner or space station operations, and starliner is still scheduled to undock from the space station as early as friday, september 6."

according to it home, the starliner set off for its first flight on june 5 and was originally scheduled to dock at the space station for a week. but as the starliner entered orbit, nasa announced the discovery of a helium leak and a control thruster problem, forcing the crew to stay at the space station for several months. the mysterious sound began to emanate from the starliner about a week ago.

the two-person crew, including wilmore and sunita williams, will stay at the space station for another six months before returning aboard a spacex dragon spacecraft.