Ultrasonic levitation — the practice of creating a standing wave between two ultrasonic sources and positioning lightweight objects such that they can float in the pressure minimums between them ...

Ultrasonic sounds are high-frequency sound waves that exceed 20,000 hertz, a range far beyond what the human ear can detect.

Given that we can now create standing waves between phased arrays of ultrasonic speakers, he explained the mechanism that allows the levitation. The standing wave creates patterns of high ...

This groundbreaking finding sheds light on the acoustic communication mechanisms of plants. The captured sound, described as a popping or clicking noise, occurs in ultrasonic frequencies beyond ...