Fig. 3.

Diagram illustrating conduction velocity estimation through triangulation. θ is computed directly using the cosine rule from the known lengths $\mathbf{a}$, $\mathbf{b}$ and $\mathbf{c}$. The angle of incidence of the wavefront is calculated with respect to the sides $\mathbf{a}$ and $\mathbf{b}$ by angles α and β, respectively. These are determined through the time differences, distances and angle θ.