Revealing technology that helps submarines become "invisible" in the blink of an eye

Explore advanced technology that helps submarines avoid detection in complex marine acoustic environments.

A team of scientists led by Zhang Zhiyi at Shanghai Jiaotong University has just announced acoustic stealth technology for submarines. (Photo: SCMP)

This project was carried out in collaboration with the China State Shipbuilding Corporation. (Photo: Naval News)

The system uses a dual vibration isolation layer consisting of a passive part that absorbs vibration and an active part that suppresses motor movement in real time. (Photo: SCMP)

Piezoelectric ceramic actuators help suppress micron-sized vibrations, reducing sound by up to 26dB at frequencies from 10Hz to 500Hz. (Photo: Defence Connect)

With this reduction, the enemy's sonar detection range can be shortened by more than half, especially at low moving speeds. (Photo: China-Arms)

The FX-LMS algorithm is integrated to control the system precisely without causing feedback instability. (Photo: Popular Mechanics)

However, system efficiency can be affected by deep-sea temperature and pressure conditions, especially with piezoelectric rubber and ceramics. (Photo: Interesting Engineering)

However, system efficiency can be affected by deep-sea temperature and pressure conditions, especially with piezoelectric rubber and ceramics. (Photo: Interesting Engineering)

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