Researchers discover ' fastest possible acceleration of sound'

Scientists say they have discovered the particular fastest possible speed of audio.

Researchers found soundwaves travelled at 36km per 2nd in solid atomic hydrogen.

That is about twice the velocity at which they can travel through gemstone – the hardest known materials in the world.

Image: You can hear the train through the tracks more quickly compared to through the air

Until now, it was not known whether there was clearly an upper speed limit, through solids or liquids.

Soundwaves go at different rates of speed, depending on what they are travelling through.

They will pass through solids more quickly than via liquids or gas – which explains why a train can be heard faster through the tracks than through the surroundings.

Scientists tested an array of materials, and found the speed associated with sound in solid atomic hydrogen is close to the theoretical fundamental restrict.

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The research, published in the diary Science Advances, came from a cooperation between Queen Mary University associated with London, the University of Cambridge and the Institute for High Pressure Physics in Moscow, Russia.

The study of soundwaves has essential scientific applications.

Teacher Chris Pickard, Professor of Components Science at the University of Cambridge, said: “Seismologists use soundwaves started by earthquakes deep in the Planet interior to understand the nature of seismic events and the properties of World composition.

“They’re furthermore of interest to materials scientists since soundwaves are related to important flexible properties including the ability to resist tension. ”

Professor Kostya Trachenko, Professor of Physics from Queen Mary University of Greater london, said: “We believe the results of this study could have further medical applications by helping us to get and understand limits of different attributes such as viscosity and thermal conductivity relevant for high-temperature superconductivity, quark-gluon plasma and even black hole physics. ”