Ultrasound technology makes virtual objects feel real

With ultrasound technology, people will be able to experience virtual environments. As explored by the video above, it is interesting how an airborne ultrasound tactile display produces a pressure field in a 3D free space, enabling users’ interaction.

The ultrasound device will allow people to feel various sensations, including temperatures, materials, or pain without physically touching anything. Ultrasound means the sound waves that are operating at a frequency above normal human hearing capabilities of 20 kHz. Although ultrasounds are frequently associated with use in the medical setting for sonograms and teeth cleanings, this ultrasound device is used for 3D interaction; it radiates pressure into the user’s hands without wearing gloves or holding any mechanical apparatuses. This technology is based on acoustic radiation pressure. A pressure field is exerted on the surface of the object to provide acoustic radiation pressure, which is essentially what an ultrasound does.

For this setup, there is a display screen constructed of ultrasonic transducers and a hand-tracking camera. The ultrasonic beans change in response to the user’s hand movements, where a simulation of interaction between a hand and a surface occurs.

The transducers’ acoustic radiation pressure is applied to the user’s skin. Each individual transducer is built to produce a single focal point that hits the hand to employ a particular sensation. The camera calculates the positioning of the hand in relation to the device; the tactile feedback is provided when the hand comes into contact with the virtual object.

This technology will be used when developing 3D games and applications in the future, augmenting the reality of 3D virtual objects.

Story via BBC