Sounds of Venus

Pictures of other planets have become familiar. Without any problems, you can find black and white, color, panoramic and even stereo images. But if someone wants not to see, but to hear other planets, he will be greatly disappointed. Very, very few stations were equipped with microphones and transmitted sounds from other planets.

At the same time, the first interplanetary stations that tried to solve this problem were the Soviet Venera-13/14 stations launched more than 30 years ago. Then this achievement went almost unnoticed. Why? Maybe because then the opportunities for the distribution of the multimedia kit were much less. Very, very few magazines had an additional record in their kit. Also, perhaps the point was that they did not transmit sound in the literal sense of the word.

The fact is that the transmission speed from the surface of Venus was not great then, but some kind of compression was used very rarely.

For example, these two black and white panoramas were transmitted 13 minutes 10 seconds. The total resolution of one panorama is 1000x211 pixels, 512 shades of gray.

Processing by Don P. Mitchell

Unlike panoramas, you need to transmit real-time sound changes. And the traffic required for this could not be put into the real transmission rate. Indeed, in addition to sound, it was still necessary to transmit data from other experiments. As a result, it was not the sound itself that was transmitted, but the volume level at the moment. Sound, according to the authors of the experiment, was a white noise.

The result, at that time, was an article on estimating wind speed in the atmosphere of Venus. Everyone can read it here

Now distributing audio materials is much easier. As a result, when I got into the hands of a synthesized sound recording from Venus, I decided to put it on the graph from the original article, and sign the sounds that I could determine. It was not possible to achieve a perfect match, but the picture complements the sound well.

A few comments.
Telephotometers - devices for obtaining continuous panoramas from the surface. An example of these panoramas is just above.

PROP-V is a device for measuring the physical and mechanical properties of soil. Ironically, when deployed, he instead of Venus hit the discarded telephotometer cover. All this is clearly visible in the panorama. You can read about it in this article Surface

drilling is well described here: KI-XXI-2 / ki-xxi_2-20.djvu

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