ESA laid out the sound of Philae probe landing on the comet Churyumov-Gerasimenko

Sensors in the supports of the Philae probe recorded the sound of a probe landing on a comet when it first touched the comet's core surface. The sensors in question are components of the SESAME-CASSE tool, which was included when the probe was planted. Needless to say, the sound in a vacuum does not spread, the sensors converted into sound the mechanical vibrations arising in the supports of Philae in contact with the comet.

This is the original sound file, the recording of mechanical vibrations at sound frequencies that no one has processed. SESAME is an abbreviation of the Surface Electrical Sounding Monitoring and Experiment Experiment, this tool includes the following elements:
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• CASSE (Comet Acoustic Surface Sounding Experiment), analyzing the mechanical parameters of the comet's surface, along with some details of the parameters of the subsurface layers;
• DIM (Dust Impact Monitor) examining the parameters of interaction with the smallest particles of a comet's matter, and the properties of these particles;
• PP - (Permittivity Probe) allows you to explore one of the key electrical properties of a comet's core material. as a result, it is possible to judge what the surface of the comet consists of and what the near-surface layers are.

As for the sound of contact with the surface of the comet, these data helped scientists to find out that there is a layer of dust several centimeters thick at the site of the collision, and under it is a hard surface (most likely dust-ice agglomerate).

Now experts are engaged in the reconstruction of the probe path after the first contact with the comet's core, the data from many instruments of the probe are used in the study. For reconstruction, scientists need to know the speed, angle of approach, and speed of rotation of the apparatus before the first approach. Also, scientists hope to find out where Philae is now (as before, only the likely region of the current location is determined).