# Physicists Create One-Way Sound Waves That Travel in a Single Direction! 🔊 **URL:** \ **Category:** News & Articles\ **Tags:** tools, technology\ **Created:** [October 12, 2024, 5:42pm UTC](https://onehack.st/t/physicists-create-one-way-sound-waves-that-travel-in-a-single-direction/293374 "2024-10-12T17:42:51Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![TheJoker](https://onehack.st/user_avatar/onehack.st/thejoker/32/22660_2.png) [@TheJoker](https://onehack.st/u/TheJoker)\ **Post date:** [October 12, 2024, 5:42pm UTC](https://onehack.st/t/physicists-create-one-way-sound-waves-that-travel-in-a-single-direction/293374/1 "2024-10-12T17:42:51Z")
**Summary:** 1. **Innovative Sound Wave Device** Scientists at **ETH Zurich** and the Swiss Federal Institute of Technology Lausanne have developed a device that allows sound waves to travel in only one direction, ensuring that sound from one source can be directed to only one listener. 2. **Device Structure** The device consists of a disk-shaped cavity with three ports arranged equally, where sound waves typically echo back. However, when activated, sound from one port is heard only by another designated port, not the third. 3. **Mechanism of Action** The innovation involves blowing swirling air into the cavity at specific speeds, which aligns the sound waves into a synchronized pattern, guiding them in one direction and enhancing their energy. 4. **Potential Applications** This discovery could lead to advancements in communication technologies, with the potential to design new metamaterials that manipulate not only sound waves but also electromagnetic waves. 5. **Research Significance** Senior researcher **Nicolas Noiray** notes that this concept of non-reciprocal wave propagation is a significant finding that could have applications in various systems. **Read more at:** [ScienceAlert](https://www.sciencealert.com/physicists-generated-sound-waves-that-travel-in-one-direction-only)