Acoustic Rainbow Emitter, a 3D-printed device, splits white noise into an acoustic rainbow without using electricity

https://phys.org/news/2025-06-3d-device-white-noise-acoustic.html

"struggle designing systems working on wide range of frequencies, most requiring active devices/ resonance-based, overcome taking in broadband white-noise signals from point source radiating sound equally in all directions/ scattering so different sound frequencies/ emitted... computational morphogenesis: fully controlled, broadband auditory wave sensing/ manipulation in free spaces, similar to biological systems, utilizing algorithms for structural optimization/ finite element analysis generating complex shapes"