Fig. 6

Skull flap pressure patterns. The left column displays the pressure patterns obtained with the hydrophone at the geometric focus through the skull flap. The right column displays the simulated pressure patterns. The rows, from top to bottom, represent the patterns with no corrections, corrections using phases obtained from simulations, and corrections using phases obtained from hydrophone measurements, respectively. The arrow in the uncorrected hydrophone scan points to a side lobe with 84 % of the peak main lobe pressure