QUESTION:
Is there enough atmosphere on Mars to transmit sound as a human would be
able to hear? What is the speed of sound on Mars?

ANSWER from Bob Haberle on October 28, 1997:
There is enough atmosphere to transmit audible sound, but the coupling isn't
that great so you wouldn't get a clear crisp sound.

The speed of sound on Mars is 240 m/s.

Robert M. Haberle
Space Science Division