tech

First audio recorded on Mars reveals two speeds of sound

17 Comments
By Juliette Collen and Daniel Lawler

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© 2022 AFP

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17 Comments
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What an unexpected discovery, two speeds of sound is something I would never have even conceived of. Amazing the things we are discovering these days.

3 ( +3 / -0 )

This is cool...

4 ( +4 / -0 )

NASA’s Perseverance Rover Captures Puff, Whir, Zap Sounds from Mars

https://www.youtube.com/watch?v=lX5iVyfF3N0

3 ( +3 / -0 )

Mars also has very valuable deposits of Turbinium. This mineral is not available on Earth but is very common on Mars.

1 ( +2 / -1 )

It sounds peaceful and only 6-9 months away. I would consider retiring there.

2 ( +2 / -0 )

Mars also has very valuable deposits of Turbinium. This mineral is not available on Earth but is very common on Mars.

Well, in Total Recall movie world it has Turbinium. I’m sure you realize in real life, Turbunium is a fictional mineral.

1 ( +1 / -0 )

"I’m sure you realize in real life, Turbunium is a fictional mineral."

We can't really assume that. Since no one has ever been to Mars, we should keep all possibilities open.

For all we know, there might be a nuclear reactor on Mars built by ancient aliens which can produce breathable air. Once Mars is terraformed colonization by humans will be possible.

1 ( +2 / -1 )

Once Mars is terraformed colonization by humans will be possible.

Mars doesn't have a magnetic field necessary to protect an atmosphere. The planet's mantle is no longer molten like that of Earth. Without the swirling convection of molten metal in the mantle there is nothing to create that protective magnetic field. That is probably why Mars lost its oceans and atmosphere.

3 ( +3 / -0 )

We can't really assume that. Since no one has ever been to Mars, we should keep all possibilities open.

The default position on every claim should be disbelief until the claim has met it's burden of proof.

2 ( +2 / -0 )

Seems understanding between the genders would become even more hopeless.

- “All of these factors would make it difficult for two people to have a conversation only five meters apart", 

4 ( +4 / -0 )

By the way JAXA accomplished very elegant missions like landing on an astroid -in complete harmony with the nature of Japanese sense of technical innovation and scientific exploration that we follow with great interest (Hayabusa II).

1 ( +1 / -0 )

We can't really assume that. Since no one has ever been to Mars, we should keep all possibilities open.

The default position on every claim should be disbelief until the claim has met it's burden of proof.

'Belief' or 'disbelief' should not be the only options or even options at all. Any real scientist has a sort of floating slurry of odd bits and pieces that do not fit into their ever evolving worldview (see: intuition) and ALL 'judgements' such as 'belief' or 'disbelief' are ALWAYS tentative. To 'believe' or 'disbelieve' is the province of religion and prejudice and lazy minds and intellectual arrogance and are the worst blindness that can befall a person who would hope to gain some small understanding of this ever more weird place we all find ourselves in. For any given 'fact', one assigns a 'probability value' weighted with the awareness of how much more there is to this place that we can not even yet see, much less 'understand'. Perception is a slippery thing and the last two hundred years of our knowledge expansion will make that clear to anyone who examines that history in detail and the 'impossibilities' which have become our daily reality. And "Turbinium" or "Unobtainium"? Sure, why not...?

-3 ( +0 / -3 )

Seems understanding between the genders would become even more hopeless.

Nagging to the next level, would be next to impossible for the lower pitched to put in a word =)

They had discovered there are two speeds of sound on the surface of Mars -- one for high-pitched sounds like the zap of the laser, and another for lower frequencies like the whir of the helicopter rotor.

This means that human ears would hear high-pitched sounds slightly earlier.

3 ( +3 / -0 )

Next time take speakers. play earth sounds from human talking to music and see how the micraphone picks up the different sounds in martian atmosphere and compare with how it sounds in Earths.

1 ( +1 / -0 )

Are there two speeds of sound with a cut off point, or does it vary according to pitch, giving a variable speed of sound? Presumably they were not hearing the laser via the crafts framework and the drone through the atmosphere.

Interesting stuff. Science is cool. Sadly, some science is now being wrecked by politics - Brexit, Covid responses and Cold War 2.

0 ( +0 / -0 )

That of course implies as a consequence not having only two sound speeds there, but many unlimited different speeds differing in value for every single frequency. Or does anyone of you only talk or listening music containing of a specific high pitch and a certain specific helicopter rotor sound? Of course not, the whole dynamic audio frequency spectrum range is used.

0 ( +0 / -0 )

Good job sharing information, NASA

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