Fig. 6
From: Do Leonardo da Vinci’s drawings, room acoustics and radio astronomy have anything in common?
![Fig. 6](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs40494-022-00713-6/MediaObjects/40494_2022_713_Fig6_HTML.png)
Directions of the incident and reflected waves KN and LMN overlapping each other on the caustic [12]. The result is the sum of the sound pressures. R: radius of the reflector