Scientists create the loudest underwater sound EVER: record-breaking 270 decibels is the same as two jet engines taking off
- Department of Energy made the discovery by making effective water jets
- This caused the water to evaporate and cumulatively created a & # 39; shockwave train & # 39;
- Consisting of alternating high and low pressure zones, this manifested itself as sound
- For the context, the underwater sound was twice as loud as a jet engine taking off
American scientists have artificially created the loudest possible underwater sound.
It was recorded with 270 decibels – the equivalent of two jet engines that take off and are made by effectively loading micro-water jets with a powerful X-ray laser.
This caused them to evaporate and form & # 39; shockwave trains & # 39; they alternated between high and low pressures, which eventually led to a sonic boom.
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After radiating small water jets with an X-ray laser, researchers looked at left and right moving trains of shock waves moving away from microbubbled areas (pictured)
Stanford's Department of Energy collaborated with Rutgers University researchers to produce the record-breaking result.
The result was so hard that, according to the team, it was responsible at the edge of what is scientifically possible under water.
& # 39; It is just below the threshold where (the sound) the water would boil in a single wave oscillation, & # 39; Dr. told Claudiu Stan, one of the authors of the study, at PhysicsBuzz.
In fact, if they had tried to go faster, they would have failed.
This is because the medium through which the sound passes through starts to degrade at the maximum point, so that the resulting sound cannot become louder.
From a technical point of view, this is a process called cavitation and is also seen in heat. Ultimately, the atoms of a material break down and no more heat can be produced.
Sub-aquatic: the team achieved its results by effectively loading micro-water jets with a powerful X-ray laser, causing them to evaporate in shock waves that produced the sound
HOW HAVE SCIENTISTS MADE THE LOUDEST UNDERWATER SOUND?
Scientists made the discovery by zapping jets of water with an X-ray laser, the Linac Coherent Light Source.
This caused the water to evaporate and produce shock waves,
While they were traveling, they formed a & # 39; shockwave train & # 39 ;.
This alternated between high and low pressures, which ultimately produced the sound slope.
The 270 dB limit is created because the medium – the water – would break down if it were more powerful and the sound would not produce.
& # 39; The amplitudes and intensities were limited by the wave destroying its own propagation medium by cavitation and therefore these ultrasonic waves in rays are one of the most intense propagation sounds that can be generated in liquid water & # 39 ;, the researchers explain in their paper .
& # 39; We estimate that the amplitudes of these pressure waves exceed the highest peak-to-peak pressures obtained with focused ultrasonic waves, and thus may be the highest-intensity sounds generated so far in liquid water. & # 39;
The instrument they used for this test was the Linac Coherent Light Source (LCLS).
Billed as & # 39; a revolutionary new tool that changes how scientists study the world of molecules & atoms, it has the power to create molecular black holes in a millionth of a second.
The findings were published in the journal Physical Review Fluids.
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