http://www.k-wave.org/forum/topic/why-is-the-maximum-supported-frequency-0hz Support for the k-Wave MATLAB toolbox en-US Tue, 12 May 2026 22:25:09 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/why-is-the-maximum-supported-frequency-0hz#post-6993 Fri, 02 Aug 2019 04:57:51 +0000 Patrick 6993@http://www.k-wave.org/forum/ <p>Nope. I was wrong, I had a material with a sound speed unintentionally set to 0 m/s... All fixed now. </p> http://www.k-wave.org/forum/topic/why-is-the-maximum-supported-frequency-0hz#post-6992 Fri, 02 Aug 2019 03:58:29 +0000 Patrick 6992@http://www.k-wave.org/forum/ <p>I've cracked the case: my model was some solid tissue surrounded by air, but was mostly air and the tissue was uncentered. Even though I made sure to place the driving pressure in the tissue, k-Wave wouldn't work until I centered the tissue and reduced the air around the model.</p> <p>Hope this helps someone in the future. </p> http://www.k-wave.org/forum/topic/why-is-the-maximum-supported-frequency-0hz#post-6991 Thu, 01 Aug 2019 18:24:58 +0000 Patrick 6991@http://www.k-wave.org/forum/ <p>Hello,</p> <p>I am using some code that I have previously successfully used with different geometries to simulate acoustic waves. However, I am getting "maximum supported frequency: 0Hz" no matter what spacial step and temporal step I use. Here is the output of the precomputation:</p> <pre><code>Running k-Wave simulation... start time: 01-Aug-2019 12:18:09 reference sound speed: 2117.5333m/s WARNING: visualisation plot scale may not be optimal for given source. dt: 1ns, t_end: 99.999us, time steps: 100000 input grid size: 300 by 256 by 238 grid points (60 by 51.2 by 47.6mm) maximum supported frequency: 0Hz expanding computational grid... computational grid size: 350 by 306 by 288 grid points WARNING: Highest prime factors in each dimension are 7 17 3 Use dimension sizes with lower prime factors to improve speed precomputation completed in 6.2307s saving input files to disk... completed in 1.7751s</code></pre> <p>As you can see, my dx in all dimensions is 0.2 mm, and my dt is 1ns. This should satisfy c*dt &lt; dx. What am I missing here?</p> <p>Thanks,</p> <p>PC </p>