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The Sound of Silence: Chinese Subs to Become Super Stealth

Banglar Bir

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The Sound of Silence: Chinese Subs to Become Super Stealth
© AFP 2016/ POOL / Guang Niu

ASIA & PACIFIC 14:58 16.12.2016Get short URL65193343 Chinese scientists have reportedly devised a new system of active acoustic protection for submarines. In a commentary for Sputnik, Russian military expert Vasily Kashin elaborated on the significance the use of this novel technology will have for the Chinese Navy. In contrast to the existing passive systems of noise suppression, the technology of active acoustic protection is meant to either mask the noise generated by a submarine’s propulsion system of jam enemy sonar.

“This new Chinese technology stems from their large-scale work on the so-called topological isolators, which consist of a current-conduction dielectric and could be used as data storage devices in future quantum computers,” Kashin said. © AP PHOTO/ ANWAR ABBAS

Pakistan to Get Eight New Attack Subs From China The Chinese researchers experimented with ring-shaped aluminum topological isolators, each 14 centimeters across. By activating a number of such rings they managed to direct reflected sound waves in the desired direction.

This means that a submarine will be able to redirect sound waves bouncing off its hull elsewhere thus making sure that they are not picked up by enemy sonar. “Just how this method will work with passive means of detection, which register noises generated by a submarine’s mechanisms, etc., is hard to tell though as in some cases such passive detectors prove more effective,” Kashin noted. But even if this method does not work with passive acoustic detection systems, it is still a major breakthrough capable of seriously changing the existing methods of submarine warfare. “Just how effective this new technology is going to be in real-life situations is hard to say as much will depend on its cost, consistency and ability to withstand long use in adverse conditions,” Vasily Kashin continued. Still, the achieved results could help the Chinese Navy to considerably improve its anti-submarine capability. “This, in turn, would be a great boost to China’s strategic defense programs and its Navy,” he said.


Read more: https://sputniknews.com/asia/201612161048647472-china-subs-stealth/
 
This only shields (and to a partial extent) the submarine from sonar signals that would otherwise reflect back with more energy and consistency. This does not solve the main issue behind noisy Chinese submarines: propulsion systems.
 
China has taken the principle of active cancellation from Air warfare (a kind of stealth technology found in Rafale) to sea warfare.. this is a first,
They will deal with passive detection (sonars) the same way Stealth technology in the air deals with passive detection (radars) and IRST, laser and IR which have no equivalent in the sea, so it will be much easier for submarines..
 
The Sound of Silence: Chinese Subs to Become Super Stealth
© AFP 2016/ POOL / Guang Niu

ASIA & PACIFIC 14:58 16.12.2016Get short URL65193343 Chinese scientists have reportedly devised a new system of active acoustic protection for submarines. In a commentary for Sputnik, Russian military expert Vasily Kashin elaborated on the significance the use of this novel technology will have for the Chinese Navy. In contrast to the existing passive systems of noise suppression, the technology of active acoustic protection is meant to either mask the noise generated by a submarine’s propulsion system of jam enemy sonar.

“This new Chinese technology stems from their large-scale work on the so-called topological isolators, which consist of a current-conduction dielectric and could be used as data storage devices in future quantum computers,” Kashin said. © AP PHOTO/ ANWAR ABBAS

Pakistan to Get Eight New Attack Subs From China The Chinese researchers experimented with ring-shaped aluminum topological isolators, each 14 centimeters across. By activating a number of such rings they managed to direct reflected sound waves in the desired direction.

This means that a submarine will be able to redirect sound waves bouncing off its hull elsewhere thus making sure that they are not picked up by enemy sonar. “Just how this method will work with passive means of detection, which register noises generated by a submarine’s mechanisms, etc., is hard to tell though as in some cases such passive detectors prove more effective,” Kashin noted. But even if this method does not work with passive acoustic detection systems, it is still a major breakthrough capable of seriously changing the existing methods of submarine warfare. “Just how effective this new technology is going to be in real-life situations is hard to say as much will depend on its cost, consistency and ability to withstand long use in adverse conditions,” Vasily Kashin continued. Still, the achieved results could help the Chinese Navy to considerably improve its anti-submarine capability. “This, in turn, would be a great boost to China’s strategic defense programs and its Navy,” he said.


Read more: https://sputniknews.com/asia/201612161048647472-china-subs-stealth/

It will be as stealth as chinese fifth generation aircrafts. Good news.
 
How do electric disesel submarine has noisy propulsion? Care to elaborate?

http://www.nationaldefensemagazine.org/archive/2008/April/Pages/AntiSub2301.aspx

My point was that this new coating would, at best, reduce the sub's visibility to sonar. This doesn't tackle the bulk of the noise problem, which is caused by the shaft + propulsion. AIP submarines are generally quieter than SSN/SSBNs but that's a virtue of its mechanism (i.e. does not use gases to drive the propeller shaft) rather than the application of this new tile.
 
This only shields (and to a partial extent) the submarine from sonar signals that would otherwise reflect back with more energy and consistency. This does not solve the main issue behind noisy Chinese submarines: propulsion systems.

You are right. But there is a solution for the noisy engines also. Remove the engines and put people in to "sail" the sub manually. That would make it super silent. No engine, no noise and super fit muscular sailors :enjoy:
 
My point was that this new coating would, at best, reduce the sub's visibility to sonar. This doesn't tackle the bulk of the noise problem, which is caused by the shaft + propulsion. AIP submarines are generally quieter than SSN/SSBNs but that's a virtue of its mechanism (i.e. does not use gases to drive the propeller shaft) rather than the application of this new tile.

That is not your point. Read what you wrote. Your bad mouthing of Chinese stuff is obvious.

"This does not solve the main issue behind noisy Chinese submarines: propulsion systems."

If you still has a little sense of military knowledge, electric disesel submarine is well known for their low noise emission due to running of batteries cell instead of combustion shaft motor. Be it Chinese, French or Russia. They are working on the same principle. And finally, if 7 skewed blade is considered non modern and noisy. Your view of Chinese military system shall throw into the trash bin.

As for nuclear propulsion area. If its 10 years ago. It may still applies but Chinese has improved and if you still consider improved LA sub standard as noisy then most of USN nuclear sub fleet shall be consider noisy too.
 
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