SL_ST Parabolic Acoustic mirror

grabcad

This architectural idea implements an interesting property of a parabolic surface to focus parallel rays to a point. This is also true for acoustic waves. The idea is not new, I have already seen it demonstrated somewhere. But I want to embed such an element in the architecture. Let's say in the park. Where people can say dear words to each other, at a great distance. Only the chosen one will hear the partner's voice.