Put simply, ferrofluid is essentially a liquid that is attracted to the poles of a magnet that are made of magnetic particles suspended in a carrier fluid. Artist Dakd Jung decided to create a speaker that uses this liquid to visualize music, but for this to be possible, the glass container first had to be treated to prevent the particles from sticking. Next, the custom 3D-printed housing had to be sanded and wired to an electromagnetic device. Read more for a video of the project.
The electromagnet is controlled by an Arduino Nano and reacts to the music by breaking the ferrofluid apart before coming together again when synced with music. Other features include a volume dial and then a second knob to control the specific audio frequency the fluid responds to, whether it be more bass or treble.