Sound Wave NotionAudio frequencyUltrasound Sound Waves고체전파음공기전파음 Virtual Reality Hologram Scientists Are Getting Better and Better at Levitating Objects With Sound WavesResearchers have come up with a new and improved way to levitate objects using sound waves alone, an impressive feat of mixed-reality technology that could pave the way for some seriously futuristic hologram-like displays.https://futurism.com/the-byte/levitating-objects-sound-waves
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