Fig. 4: Pressure maps and profiles for the bifocal holograms.
From: Evaluating the accuracy of acoustic holograms for precise spatial targeting within the brain
a–c Normalized peak-negative pressure maps of the simulated holograms for foci separations of 7 mm, 15 mm, and 68 mm, respectively. d–f Normalized experimental pressure maps measured with a needle hydrophone for the corresponding holograms above. g–i Normalized pressure profiles where y = 0 mm for the target, simulation, and experimental results for the 7 mm, 15 mm, and 68 mm foci separations, respectively.
