Finland Scientists Control Electricity with Sound Waves in Stunning Lab Breakthrough

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Scientists in Finland have unveiled a remarkable laboratory breakthrough that allows electricity to be guided through open air using ultrasonic sound waves, a development that has gone viral globally amid claims of a looming “wireless electricity revolution.”

The research, conducted by scientists affiliated with the University of Helsinki and published in Science Advances, shows that focused ultrasonic fields can precisely steer electrical plasma sparks, effectively creating what researchers describe as “acoustic” or “invisible” electric paths in the air.

The study, titled “Electric Plasma Guided with Ultrasonic Fields,” was carried out in collaboration with the Public University of Navarre in Spain and the University of Waterloo in Canada.

Under normal conditions, high-voltage sparks travel unpredictably, branching chaotically through the air. However, the researchers demonstrated that when ultrasonic sound waves are applied, these sparks can be transformed into stable, directed paths. The sound waves locally heat and reshape air density, forming low-density channels that guide subsequent electrical discharges with millimetre precision and near-instant response times.

In controlled demonstrations, the team successfully steered sparks to selectively light individual neon bulbs, curved electrical paths around physical obstacles, and even generated faint, contactless haptic sensations on human skin.

“This precise control of electrical discharges opens up exciting possibilities for atmospheric research, biological applications, selective circuit activation and contactless tactile interfaces,” said Prof. Ari Salmi of the University of Helsinki’s Electronics Research Laboratory.

Despite dramatic online claims, experts have cautioned that the technology does not enable large-scale wireless electricity transmission. The experiments involved short electrical discharges of approximately four centimetres and were not designed to deliver usable power for charging devices or supplying homes.
Scientists describe the work as a proof-of-concept focused on controlling plasma and electrical sparks, with potential future applications in precision welding, ignition systems, plasma processing and innovative haptic technologies such as contactless Braille systems.

The ultrasonic spark-guiding method is also separate from other wireless power research taking place in Finland. Laser-based “power-by-light” systems are being explored for specialised industrial environments, while radio-frequency energy harvesting—studied at institutions such as the University of Oulu—aims to power low-energy IoT sensors using ambient signals. These technologies remain experimental and highly limited in scope.

Fact-checkers have pushed back against viral narratives suggesting Finland has combined acoustic, laser and radio technologies to eliminate plugs, cables and batteries, describing such claims as misleading and exaggerated.

While the dream of long-range, high-power wireless electricity—first imagined by Nikola Tesla—continues to face major challenges in efficiency, safety and distance, researchers say the Finnish breakthrough represents a significant step forward in the scientific control of electrical phenomena.

For now, the so-called “acoustic wire” remains a compelling laboratory innovation rather than a household power solution—but it has reignited global interest in what the future of electricity might look like without physical wires.