Snapshot time t = 710 μs for the radiation pattern of a point force (directed along x₂) vibrating at frequency 10 kHz located at the gravity point of an isosceles triangle of height cm and base 20 cm (a), isosceles triangle of height cm and base 20cm (b), isosceles triangle of height cm and base 20 cm (c); morphing result (d) between (a) and (b). Note the strong similarities between (c) and (d). (e) is (c) transformed in a grayscale image, (f) is (d) transformed in a grayscale image, and (g) is the absolute value of the difference between (e) and (f). Note that the size of the field is 80 cm by 80 cm.