[Shivetya]

Since the rover has a microphone I wonder how through the thin air the helicopter will sound?

[jshmrsn]

They actually have a clip of the sound in the video, and if I remember correctly that sound was recorded in the 1% atmosphere chamber, so should sound similar to how it would sound on Mars.

[pimlottc]

Direct link to footage of test flight with audio: https://www.youtube.com/watch?v=GhsZUZmJvaM&t=343s