– NASAInSight (@NASAInSight) December 7, 2018
The audio was picked up by an air pressure sensor and by the seismograph on board the InSight. The air pressure sensor detected the air vibrations directly, while the seismograph recorded the vibrations caused by the Martian wind blowing in the solar panels of InSight. Scientists estimate that the wind blows between 10 and 15 mph.
"The InSight lander acts like a giant ear," said Tom Pike, who is part of InSight's scientific team. "The solar panels on the sides of the probe respond to fluctuations in the pressure of the wind, it's as if InSight is putting its ears and hearing the wind from Mars beating it." When we look at the direction of the probe vibrations coming from the solar panels, expected wind direction at our landing site. "