Ultrasonic Transducers

Ultrasonic transducers are transducers that convert ultrasound waves to electrical signals or vice versa. Those that both transmit and receive may also be called ultrasound transceivers; many ultrasound sensors besides being sensors are indeed transceivers because they can both sense and transmit. These devices work on a principle similar to that of transducers used in radar and sonar systems, which evaluate attributes of a target by interpreting the echoes from radio or sound waves, respectively. Active ultrasonic sensors generate high-frequency sound waves and evaluate the echo which is received back by the sensor, measuring the time interval between sending the signal and receiving the echo to determine the distance to an object. Passive ultrasonic sensors are basically microphones that detect ultrasonic noise that is present under certain conditions, convert it to an electrical signal, and report it to a computer.

  • Ultrasound Tackles "Invisible" Nano-plastics

     

    COVID pandemic fast-tracks technological development that will clean plastic litter in oceans. The current COVID pandemic challenges our societies with extensive amounts of plastic mask debris released into our environment. As a response to this growing issue, and to respond to the nanoparticle pollution in the water ecosystems, several technological solutions are being accelerated to achieve the overall goal – a cleaner, safer and healthier environment for everyone. InNoPlastic, a newly launched EU H2020 research and innovation project, combines ultra-sound methodologies with other innovative solutions, to tackle plastic litter and enable easier removal from oceans and the seas worldwide.