Sound on the surface of Mars is expected to be similar to that on Earth, except much fainter because the atmospheric pressure is much less than on Earth. Martian atmospheric pressure is about 7 millibars (as on Earth, this is altitude-dependent), which is less than 1% of the Earth's. The below example shows how this difference in pressure affects sound. The first sound is a recording of a person coughing, and the second, how this would sound on the Martian surface.

• Coughing on Earth
• Coughing on Mars

To hear the sound samples and to see their respective sound spectrograms, please click on the links on the right menu bar. All sound samples are about 100k.

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