http://www.k-wave.org/forum/topic/problems-of-order-of-magnitude-of-acoustic-pressure-simulation Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 02:20:34 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/problems-of-order-of-magnitude-of-acoustic-pressure-simulation#post-6616 Mon, 29 Oct 2018 11:42:04 +0000 Bradley Treeby 6616@http://www.k-wave.org/forum/ <p>Hi Math,</p> <p>Can you post a working example? I'll take a look.</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/problems-of-order-of-magnitude-of-acoustic-pressure-simulation#post-6599 Tue, 09 Oct 2018 15:49:10 +0000 math.guy 6599@http://www.k-wave.org/forum/ <p>Hello<br /> I m' developing a simulation of ultrasound for a HIFU application in order to measure the acoustic pressure. However, I have a problem for order of magnitude of found pressure when I do a temporal shoot with a spherical transducer with 256 elements (256 source k wave) .<br /> the grid is :</p> <p>Nx = 300; % number of grid points in the x direction<br /> Ny = 300; % number of grid points in the y direction<br /> Nz = 400; % number of grid points in the z direction<br /> dx = 0.5e-3; % grid point spacing in the x direction [m]<br /> dy = 0.5e-3; % grid point spacing in the y direction [m]<br /> dz = 0.5e-3; % grid point spacing in the z direction [m]<br /> dt=1e-7;%s<br /> Nt=1200;%s</p> <p>kgrid.dt=dt;<br /> kgrid.Nt=Nt;<br /> t_end = kgrid.Nt*kgrid.dt;<br /> kgrid.t_array=[0:kgrid.dt:t_end];</p> <p>the paramater of pressures sources:</p> <p>power_source=1e6;%Pa<br /> freq=1000e3;%Hz<br /> t_shoot=50e-6;%s</p> <p>source.p = source_mag * sin(2 * pi * source_freq * t_shoot);</p> <p>the focusing works but I find pressures order to 10^-23( Pa??)when I use p_max_all for the sensors. I don't understand why?</p> <p>Math </p>