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Perseverance is the first rover with microphones on Mars. This is why we don't have audios from prior missions.

• nkoren 6y ago
  Working microphones. They've sent microphones previously, which have either failed or been on missions that crashed.
• m4rtink 6y ago
  IIRC the Mars Insight mission was able to reconstruct the sounds of wind in Mars from signals picked up by their super sensitive seismometter.