Have this article read to you at https://youtu.be/8NtnwJD1JOc It took some outside-the-box thinking by the folks at Aurora, a Boeing-owned company, to arrive at this invention. They asked the question “but Why are drones so loud?” The answer is not so simple: constructive interference. When a propeller spins, it has a noise profile. This noise […]
Have this article read to you at https://youtu.be/aoDwIFxnuik This may be old news, but let’s look at the toroidal propeller patent from 2020. It is a valiant attempt to make drones more palatable for the general public. The idea came from the “ring wing” design, an airplane with a wing in the shape of a […]
Have this article read to you at https://youtu.be/7e6b1ifQDYQ. Phase cancellation is an interesting acoustic phenomenon. If two identical signals are 180 degrees out of phase, they will completely cancel each other out. With the eventual proliferation of delivery drones, noise will be an issue. As Amazon puts it, “the net effect of the noises generated […]