Google has received approval from US regulators to deploy a futuristic technology that allows smart devices to be controlled by hand gestures alone.
The Federal Communications Commission (FCC) approved Project Soli, which was first announced by Google four years ago, saying that it would "serve the public interest" to push forward with development of the technology.
The interactive control system uses radar-based motion sensors to detect and track hand movements with millimetre accuracy.
This allows people to interact with devices without the need for any form of physical controls.
The idea is that people will be able to control everything from TVs to smart watches in an intuitive, touch-free way.
Familiar gestures, such as pushing a button or turning a volume knob, allow a person's hand to be transformed into a universal remote control.
"Even though these controls are virtual, the interactions feel physical and responsive," the Project Soli website states. "Feedback is generated by the haptic sensation of fingers touching each other. Without the constraints of physical controls, these virtual tools can take on the fluidity and precision of our natural human hand motion."
Project Soli Founder Ivan Pouyrev explained his motivation behind the endeavour in a video posted in 2015.
"Capturing the possibilities of human hands was one of my passions," he said. "How could we take this incredible capability, the finesse of human actions, and apply it to the virtual world?"
He explained that the technology can fit onto a single chip measuring 8mm by 10mm, allowing it to fit in a large variety of devices.
"What is most exciting about it is that you can shrink the entire radar and put it in a tiny chip," he said. "That's what makes this approach so promising. It's extremely reliable, there's nothing to break. There's no moving parts, there's no lenses, there's nothing, it's a piece of sand on your board."
