Our technology

Ultrasound has revolutionized applications in liquids and tissues. Doctors are using sound waves to determine a baby’s gender after only 12 weeks. Fishing boats are using sonars to see underwater. Why do we still not have similar applications in air? Sonair AS develops sonars for in-air applications.

3D-imaging with sound in air

Ultrasound waves are generated by transducers using piezoelectric crystals to convert electrical energy to sound. Single transducers can give accurate distance measurements by using the Time-of-Flight principle. Transducers used in combination can give 3D images by using beamforming. Sophisticated techniques are developed over decades to interpret and visualize large point clouds. For in-air applications, we are familiar with the single transducer distance measurements from car parking sensors. Imagine what we can do when we master 3D imaging with sound in air.

Improving Ultrasonic Transducers with MEMS processing

Off the shelf transducers are not suitable for Sonair’s purpose. We are scaling down and improving the transducer technology using MEMS processing. Sonair has exclusive access to PMUTs (Piezoelectric Micromachined Ultrasonic Transducers) from SINTEF in Norway (piezomems.com), and we are together developing customized designs and process improvements. Currently we have 2×2 mm PMUTs emitting ultrasound at 100 dB, just as loud as a rock concert but at a frequency inaudible to the human ear.

Technology improving tomorrow’s devices

Combining our PMUTs with processing techniques developed for medical applications enables 3D imaging in air. In a few years, you will find Sonair’s air sonars in building automation sensors, robotics systems and maybe in your next car.