A speaker that creates a beam of sound like a laser? Believe it! Using specialized transducers, the author built a directional speaker suitable for pranks. This unique device produces a sound beam that disappears when you move to the side and bounces off surfaces, fooling listeners about its origin. Even better, it’s great for rickrolling. But, don’t expect high-quality sound: with no bass, distortion at high volume, and strange effects on microphones, it’s far from a top-notch speaker. However, understanding the physics behind this directional speaker can be fascinating. With a formula to estimate beam width and tips on array design, you can create your own directional speaker.
https://10maurycy10.github.io/projects/speaker/