Engineers Debut the Acoustic Prism The device splits sounds without digital help https://www.scientificamerican.com/article/engineers-debut-the-acoustic-prism/
Acoustic Prism Invented at EPFL https://www.youtube.com/watch?v=6sSBPxAv2qk Exploiting the leaky-wave properties of transmission-line metamaterials for single-microphone direction finding https://asa.scitation.org/doi/full/10.1121/1.4949544 Harry
