Scientists at Sungkyunkwan University (SKKU) have created a material that behaves like rubber yet generates electricity when stretched. This discovery has led to the development of an "artificial ultrasonic sensory synapse" – a device that mimics the echolocation capabilities of dolphins.
Instead of relying on complex and bulky systems typically used for underwater sensing, the new sensor utilizes the piezoelectric properties of a stretchable polymer. When ultrasonic waves bounce off objects underwater and reach the sensor, they cause vibrations, which are then converted into electrical signals. These signals are subsequently processed to create a form of "artificial vision" for underwater vehicles or robots.
This technology opens doors for the creation of more agile and sensitive underwater robots capable of navigating murky waters or exploring hard-to-reach areas, much like marine life. Rather than depending on visual cameras, which perform poorly underwater, robots will be able to "feel" their surroundings using sound, as dolphins do, navigating even in complete darkness.
This is a step towards creating more autonomous underwater systems that can perform complex tasks, from scientific research to search and rescue, without constant human supervision. Imagine an underwater drone that can "see" through silt and algae simply by listening to the echoes of its ultrasonic "voice."