Sound, metal hydrogen is 100 times faster than air

Speaking of the speed of sound, the speed transmitted through the air is around 340m per second. 340m per second increases or decreases by 0.6m per second every 0.1 degrees at 15 degrees Celsius temperature. However, the speed of sound changes according to the mediating material. For example, if you are in helium gas at 15 degrees Celsius, it is 997 meters per second.

Researchers at the University of Cambridge and Queen Mary University in London have investigated the material that can propagate the fastest sound and found that its speed reaches 36 kilometers per second. It is transmitted 100 times faster than the speed in air.

What is the material that transmits sound at high speed? The research team explains that it is hydrogen in a shape that can be degraded by high pressure. For example, the center of a giant gaseous planet like Jupiter is under high pressure, and it is assumed that hydrogen is compressed in the same place to solidify it with a conductive metallic property.

The research team concluded that the microstructure constant, which represents the strength of the interaction between charged particles, and the proton mass to electron mass ratio are assets using the two constants. The research team revealed that, for example, since diamond is known to be the hardest material, it was common knowledge that sound propagation is the fastest to pass through diamonds, but it is not known whether there are theoretical and fundamental limitations.

With this theory, it is expected that the higher the atomic mass, the lower the speed of sound propagating. Conversely, the sound is transmitted most quickly in solid metal hydrogen. The researchers say how fast sound travels through matter, or computes it by a computer, and the speed is theoretically close to its intrinsic limit.

The results of this study are expected to be helpful in discovering and understanding the limiting range of various properties such as high-temperature superconductivity, quark-gluon plasma generation, black hole, and the relationship between physical viscosity and thermal conductivity. Yet another expert pointed out that while this basic constant can be used to get something in terms of speed, the underlying reason for this to reach its limit is still unclear and not entirely sure. Further research is needed for an accurate understanding. Related information can be found here .