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Scientists use X-ray lasers to create the loudest underwater sound to date
- Categories:News
- Time of issue:2021-08-31 09:58
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(Summary description)In the air, the maximum sound cannot exceed about 194 decibels, while in water it is about 270 decibels.
A few days ago, a team led by Gabriel Blaj, a scientist at the SLAC National Accelerator Laboratory and Stanford University, created the largest underwater sound to date.
The researchers used SLAC's Linac Coherent Light Source (LCLS) X-ray laser to bombard microjets of water (between 14 and 30 microns in diameter), creating an incredible sound pressure of over 270 decibels.
When a short X-ray pulse hits water, it evaporates and produces shock waves. This shock wave then passes through the ejector and forms a copy of itself in a "shock wave train" consisting of alternating areas of high and low pressure. In other words, a very loud underwater sound.
The team found that once the intensity of the sound exceeds a certain threshold, the water will burst and turn into small bubbles, which will immediately collapse in a process called cavitation. Because the pressure in the sound waves generated by X-rays is just below the separation threshold, the underwater sound at this time will become the loudest.
The research results have been published on Physical Review Fluids.
Scientists use X-ray lasers to create the loudest underwater sound to date
(Summary description)In the air, the maximum sound cannot exceed about 194 decibels, while in water it is about 270 decibels.
A few days ago, a team led by Gabriel Blaj, a scientist at the SLAC National Accelerator Laboratory and Stanford University, created the largest underwater sound to date.
The researchers used SLAC's Linac Coherent Light Source (LCLS) X-ray laser to bombard microjets of water (between 14 and 30 microns in diameter), creating an incredible sound pressure of over 270 decibels.
When a short X-ray pulse hits water, it evaporates and produces shock waves. This shock wave then passes through the ejector and forms a copy of itself in a "shock wave train" consisting of alternating areas of high and low pressure. In other words, a very loud underwater sound.
The team found that once the intensity of the sound exceeds a certain threshold, the water will burst and turn into small bubbles, which will immediately collapse in a process called cavitation. Because the pressure in the sound waves generated by X-rays is just below the separation threshold, the underwater sound at this time will become the loudest.
The research results have been published on Physical Review Fluids.
- Categories:News
- Time of issue:2021-08-31 09:58
- Views:
Information
In the air, the maximum sound cannot exceed about 194 decibels, while in water it is about 270 decibels.
A few days ago, a team led by Gabriel Blaj, a scientist at the SLAC National Accelerator Laboratory and Stanford University, created the largest underwater sound to date.
The researchers used SLAC's Linac Coherent Light Source (LCLS) X-ray laser to bombard microjets of water (between 14 and 30 microns in diameter), creating an incredible sound pressure of over 270 decibels.
When a short X-ray pulse hits water, it evaporates and produces shock waves. This shock wave then passes through the ejector and forms a copy of itself in a "shock wave train" consisting of alternating areas of high and low pressure. In other words, a very loud underwater sound.
The team found that once the intensity of the sound exceeds a certain threshold, the water will burst and turn into small bubbles, which will immediately collapse in a process called cavitation. Because the pressure in the sound waves generated by X-rays is just below the separation threshold, the underwater sound at this time will become the loudest.
The research results have been published on Physical Review Fluids.
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