Acoustic levitation is a technique that uses sound waves to lift small objects without any physical contact. By generating high-frequency sound waves, researchers create standing waves that produce areas of high and low pressure. These pressure differences can counteract the force of gravity, allowing tiny particles or droplets to float in mid-air. This method has various applications in science and technology, including materials research and pharmaceuticals. It enables scientists to study substances in a controlled environment without contamination, as there are no surfaces for the materials to touch. Acoustic levitation is a fascinating intersection of physics and engineering.