April 29, 2020 / by Diego / 4 comments

How many reflection do you hear?

Shoebox: 2D case

$$ N(k) =2k^2 + 2k + 1 $$

Shoebox: 3D case

$$ N(k) = \frac{1}{3} (4k^3 + 6k^2 + 8k + 3) $$