http://www.k-wave.org/forum/topic/how-to-set-the-value-of-points_per_wavelength-and-f_max Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 00:51:13 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/how-to-set-the-value-of-points_per_wavelength-and-f_max#post-6157 Thu, 19 Oct 2017 09:30:34 +0000 Bradley Treeby 6157@http://www.k-wave.org/forum/ <p>Hi Lirj,</p> <p>(1) The number of points per wavelength (PPW) depends on the frequency of your source, and the grid spacing used in your simulation (e.g., <code>dx</code>). You can change the number of PPW by change either of these things, where</p> <p><code>PPW = c0 / (dx * f0)</code></p> <p>(2) In that formula, the maximum frequency is the maximum frequency of interest in your simulation. For example, if you are using a toneburst, it might be the maximum frequency present in the toneburst.</p> <p>(3) The PPW depends on the wavelength (given by the sound speed and frequency), and the grid spacing.</p> <p>Hope that helps,</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/how-to-set-the-value-of-points_per_wavelength-and-f_max#post-6150 Sat, 14 Oct 2017 17:31:46 +0000 lirj 6150@http://www.k-wave.org/forum/ <p>Hi Dr. Treeby and Dr. Cox,</p> <p>I have 3 questions about the points_per_wavelength.<br /> (1) How to change the value of the points_per_wavelength?<br /> (2) How to calculate the f_max if I defined the points_per_wavelength by<br /> points_per_wavelength = 3;<br /> dx = c0_min/(points_per_wavelength*f_max);<br /> (3) What does the number of points_per_wavelength depend on, the sound speed of the medium or density or else?</p> <p>I hope you can help me to solve these problems. Thanks.<br /> Best regards!<br /> Lirj </p>