Take a look at a set of Spirulas, nifty matte black speakers 3D printed from sand. Deeptime has designed their sleek and unique sound system after the spiral-shaped cochlea in the human ear. Deeptime says they developed this new composite material and, when freshly printed, the sand cores are porous and brittle. They set it with a bespoke hardener, which they say solidifies the Spirula speaker exteriors into air-tight, resonance-free structures.
Additional Spirula design elements include an “ergonomically calculated angle” that supposedly aims sound directly at your ears. The speakers have a 3″ full-range driver with bamboo fiber paper cone, structured Santoprene surround, and underhung motor. The driver sits in the tapering spiral of the cochlea, where sound waves are blocked from radiating out of the rear of the unit. Each Spirula tube also has an absorbent fiber fill to soak up additional sound energy from the back of the driver.