【Core Principle of Acoustic Levitation】：This demonstrator is based on the principle of standing waves in sound fields. When a single-frequency sound wave propagates in a resonant cavity, it forms a stable standing wave with nodes and antinodes. By placing a small sphere at an antinode, the acoustic pressure difference counteracts gravity, enabling visible levitation. 【Adjustable Frequency for Custom Experiments】：The frequency range is adjustable from 200–600Hz, allowing users to explore how different sound wave frequencies affect levitation height and stability. This flexibility supports in-depth exploration of standing wave properties and acoustic force principles. 【Safe & Stable 12V Power Supply】：Powered by a 12V DC adapter, the device ensures safe, consistent operation without battery limitations. The clear acrylic enclosure protects internal components while providing an unobstructed view of the levitation process. 【Easy Step-by-Step Operation】：Designed for intuitive use: place the instrument on a stable surface, connect the 12V power supply, and adjust the potentiometer to start the experiment. Control the output power to adjust the sphere’s position, and fine-tune the frequency (200–600Hz) to achieve stable, floating effects. 【Ideal for STEM Education & Physics Demonstrations】：Perfect for classroom teaching, science fairs, and homeschooling, this tool makes abstract acoustic concepts tangible. It helps students visualize sound wave propagation, standing wave formation, and acoustic levitation, fostering a deeper understanding of classical physics.