Mars Microphone

The Phoenix lander has a microphone that is currently turned off. Are they ever going to turn it on? Surely, it could provide useful science data. It might be able to hear the wind. Possibly the thermal cycling of the subsurface ice might be audible. When the TEGA vibrators are on, the microphone might return useful engineering data that might help to diagnose any problems that might arise. Why not turn it on? At the very least, it would help with public outreach.