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Rock avalanche...on Mars

Community Beginner ,
Sep 14, 2023 Sep 14, 2023

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So an unusual question perhaps. As part of a person al demo I have a rock avalanche happening on Mars.
I undertsand there is some atmosphere on Mars so I assume there would be some sound travel, unlike say on the lunar surface.
So to be physically accurate, how would you modify the sound of a rock avalanche on earth to make it sound like it is on Mars? The same just less loud or a bit muffled or?

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Community Expert ,
Sep 14, 2023 Sep 14, 2023

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An interesting question 🙂

See: https://djmag.com/news/mars-has-two-speeds-sound-nasa-audio-recording-reveals

So, if the avalanche is some distance away, the sound would reach you more slowly.

Think the timing of thunder and lightening. The futher away, the more time between the flash and the rumble.

It also implies the low frequencies are delayed more - so crack as the avalanche starts and then the low rumble.

 

Best regards, Euan.

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Community Expert ,
Sep 14, 2023 Sep 14, 2023

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A lot less loud, and with hardly any higher frequencies at all - so a very quiet rumbling sound. Mars is weird - sound travels at different speeds, depending upon its frequency; lower pitched sounds travel slightly slower than any sound above about 240Hz. The actual speed of the sound is generally slower than on earth (250m/s compared to 343m/s) but because the atmosphere is almost all Carbon Dioxide and very thin, a sound that could be heard 64 metres away on Earth would only travel about 8 metres on Mars.

 

Best question we've had all year!

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Community Beginner ,
Sep 14, 2023 Sep 14, 2023

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Thanks for the detailed reply!

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