Briefly about the opening writes TASS. Sound waves are vibrations that can propagate through various media. They have their own speed in each environment. In air, for example, it is equal to 335 m / s, and in water – 1.5 km / s. The scientists decided to find out what the fundamental upper limit for the speed of sound is.
The researchers found that the limit in this case is associated with two fundamental constants – the ratio of the masses of the proton and the electron and the fine structure constant. Because of these constants, the maximum speed of sound is limited to 36.1 km / s. Sound can almost reach this limit in metallic hydrogen.