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Scientists Create Invisible Electric Wire Using Sound Waves

The Role of Electric Sparks in Technology

Illustration of electric sparks being controlled by sound waves for precise navigation

Electric sparks play a crucial role in welding, electronic, germ elimination and fuel ignition in certain car engines. However, despite their utility, they are difficult to control in open environments, often splitting into erratic branches that naturally gravitate toward nearby metallic objects.

Breakthrough in Electricity Transport Through Air

Researchers have discovered a way to transport electricity through air using ultrasonic waves, as detailed in a recent Science Advances study. This innovation enables controlled spark movement, allowing for obstacle navigation and precise targeting, even on insulating materials.

Scientific Discovery and Experimentation

Dr. Asier Marzo, lead researcher at the Public University of Navarre, stated, "We discovered this phenomenon more than a year ago, but it took months to control it and even longer to uncover the scientific explanation behind it."

How Ultrasound Controls Electric Sparks

This directional control happens as the sparks heat the surrounding air, causing it to expand and become less dense. Ultrasonic waves then channel the heated air toward regions of higher sound intensity, guiding subsequent sparks along these low-density pathways due to their reduced breakdown voltage.

Applications of Controlled Sparks

"The precise manipulation of sparks paves the way for applications atmospheric sciences, biological processes and controlled circuit activation," says Prof. Ari Salmi from the University of Helsinki.

Advancements Over Traditional Methods

Previously, guiding sparks relied on laser-induced discharges, commonly referred to as 'electrolasers,' which necessitated high-powered lasers and precise timing between the laser pulse and electric discharge. This new approach, utilizing ultrasound instead of laser, ensures:

  • Safety for both eyes and skin
  • Compact and affordable equipment
  • Continuous operation feasibility

Future Potential of Contactless Electricity Transport

"I find it exciting to explore the use of extremely faint sparks for generating precise tactile sensations in the hand, which could lead to the development of the first contactless Braille system," says Josu Irisarri, lead author from the Public University of Navarre.

Source


"The discovery of electricity transport through sound waves opens exciting possibilities for wireless energy transmission, electronics and even contactless Braille technology. As researchers continue exploring this breakthrough, its application could transform various industries.

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