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Why do cracking knuckles make a popping noise?



For those of us who crack our knuckles every day, listening to these knuckles is strangely one of the most satisfying sounds of all time.

Even the story of the popular old women that cracking the knuckles can later cause arthritis years have not kept the crackers from going ahead the way they were.

However, the source of this noise has been hotly debated for many years.

In 1971, a team of researchers from the University of Leeds suspected that the formation of blisters in the fluid of the joints caused the well-known clicking sound.

However, this theory was invalidated for decades by further research, since it was discovered that after cracking the knuckles still bubbles remained in the synovial fluid.

Vineeth Chandran Suja and Abdul Barakat have decided to create a mathematical model to find out where the crackling sound comes from.

A study described in Scientific Reports explains how Suja and Barakat used not only mathematical equations but also a geometric representation of the kingpin to deduce how the noise is generated.

They concluded that when the knuckles are broken, tiny bubbles in the synovial fluid collapse due to pressure fluctuations in the fluid.

This chain of events leads to the cracking noise we all have

However, Suja and Barakat continued their research as the team in the 1

970s.

Her mathematical model implies that only the bubbles must exist to partially collapse to produce a blast.

Consequently, the fact that there are cracks in synovial fluid after cracking is insignificant.

The authors demonstrated how the pressure left by the collapsing bladders in the articular joints produces sound waves that can be calculated by their mathematical model.

Their research implies that not only can the noise of ankle tears be distinguished by their mathematical model, but also that the collapse of the bladders most likely results in a nuisance as annoying as annoying.

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