f 60[kHz] Frequency phi (-pi/6)[rad] Wave direction angle, phi theta (4*pi/6)[rad] Wave direction angle, theta k1 sin(theta)*cos(phi) Incident wave direction vector, X component k2 sin(theta)*sin(phi) Incident wave direction vector, Y component k3 cos(theta) Incident wave direction vector, Z component R 30[mm] Model domain radius