Perseverance recorded Sound of Ingenuity Mars Helicopter during 4th flight
On May 7, 2021 NASA published Audio Sound and Video of Ingenuity Helicopter flying on Mars recorded by Perseverance Rover’s SuperCam laser microphone.
It is for the very first time that any rover has recorded a sound of man made object which is also a Helicopter. NASA’s Perseverance Mars rover used its SuperCam microphone to listen to the Ingenuity helicopter on April 30, 2021 which flew on Mars for the fourth time. With Perseverance parked 262 feet (80 meters) from the helicopter’s takeoff and landing spot, the mission wasn’t sure if the microphone would pick up any sound of the flight. Even during flight when the helicopter’s blades are spinning at 2,537 rpm, the sound is greatly muffled by the thin Martian atmosphere. It is further obscured by Martian wind gusts during the initial moments of the flight. Listen closely, though, and the helicopter’s hum can be heard faintly above the sound of those winds.
Scientists made the sound, which is recorded in mono, simpler to hear by isolating the 84 hertz helicopter blades sound, diminishing the frequencies under 80 hertz or more 90 hertz, and expanding the volume of the re constructed signal. A few frequencies were chopped out to draw out the helicopter's sound.
Credit: nasa.gov, NASA/JPL-Caltech, NASA/JPL-Caltech/ASU
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