Researchers have created a new sound wave director that can target specific ports and mute sound everywhere else.
Scientists at ETH Zurich and the Swiss Federal Institute of Technology Lausanne have developed a device that directs sound waves in one direction without wasting energy. This breakthrough sound wave director consists of a disk-shaped cavity with three equidistant ports for sending or receiving sound.
When activated, sound from one port is only heard at a specific second port, not the third. This is achieved by introducing swirling air into the cavity at a precise speed and intensity, creating a synchronized, repeating pattern of sound waves.
The researchers believe that the sound wave director could help them better understand and design future communications technologies.
