About: Build your own cutting-edge devices coming directly from UpnaLab. UpnaLab is the future interactive devices lab working with Ultrasonics, electromagnetism, lasers and more. More About UpnaLab » Tractor Beams are mysterious waves that can attract particles towards the source. Here, we will show you how to build an Acoustic Tractor Beam with components that can be bought directly on the Inter
![Acoustic Tractor Beam](https://cdn-ak-scissors.b.st-hatena.com/image/square/1d18a520388c1c5813be6754d6b367d6c501e3ce/height=288;version=1;width=512/https%3A%2F%2Fcontent.instructables.com%2FFG3%2FPNU3%2FIXGFRNUE%2FFG3PNU3IXGFRNUE.png%3Fauto%3Dwebp%26frame%3D1)