The problem was that the sound was dispersed while traveling and the waves reached their destination poorly. Therefore, the researchers of the new study decided to make sound waves not lose energy in their one-way path. They managed to prevent the sound from being propagated backwards while preventing it from being attenuated when it travels forward. In this way, the sound became even stronger.
The method of doing this was that the rotating air was blown into the cavity with a certain speed and intensity, and this caused the sound waves to synchronize with a repeating pattern. This not only directed the sound waves in one direction, but also gave more energy to these oscillations so that the waves did not disperse.
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Ironically, the idea of ​​using oscillations to amplify sound waves came from research that aimed to reduce waves. Oscillations that interact with sound waves can be harmful to some systems, such as aircraft engines, but the researchers found that they can also be used for positive purposes.
The scientists’ new technique may be useful in designing more advanced communication technologies. Such systems can be used to better guide electromagnetic waves used in radar systems. The researchers’ achievement can help to avoid unwanted reflections and may pave the way to apply the same method to electromagnetic waves.
The study is published in the journal Nature Communications.
