http://www.k-wave.org/forum/topic/defining-local-absorption Support for the k-Wave MATLAB toolbox en-US Tue, 12 May 2026 22:26:24 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/defining-local-absorption#post-6488 Thu, 14 Jun 2018 22:48:56 +0000 Bradley Treeby 6488@http://www.k-wave.org/forum/ <p>Hi Babak,</p> <p>Could you post a simple example of your code working for one case, but not the other? I'll take a look. </p> <p>Brad. </p> http://www.k-wave.org/forum/topic/defining-local-absorption#post-6477 Thu, 31 May 2018 10:45:12 +0000 babakkh 6477@http://www.k-wave.org/forum/ <p>Hi again,</p> <p>I have tried several times to model absorption in the part of the domain for the case of transient pressure source. But it becomes unstable. The same model works for a harmonic source. </p> <p>I would highly appreciate it if you could have an example of this scenario to see if it works. </p> <p>Regards, </p> <p>Babak </p> http://www.k-wave.org/forum/topic/defining-local-absorption#post-6277 Sun, 04 Feb 2018 10:34:09 +0000 Bradley Treeby 6277@http://www.k-wave.org/forum/ <p>Hi Babak,</p> <p>All the k-Wave examples are accessible via the MATLAB help browser. Open help, then select k-Wave. You should find the example under the heading "Numerical Analysis".</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/defining-local-absorption#post-6271 Fri, 26 Jan 2018 10:55:37 +0000 babakkh 6271@http://www.k-wave.org/forum/ <p>Hi Brad,</p> <p>Thanks for your response. I couldn't find the example Power Law Absorption. Would you please tell me where that file is?</p> <p>Regards,</p> <p>Babak </p> http://www.k-wave.org/forum/topic/defining-local-absorption#post-6262 Thu, 18 Jan 2018 14:05:17 +0000 Bradley Treeby 6262@http://www.k-wave.org/forum/ <p>Hi Babak,</p> <p>Yes, the absorption also works for broadband sources. Foe example, see the "Modelling Power Law Absorption Example". I'm not sure I follow what you mean by "leakage of acoustic energy to the absorbing domain".</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/defining-local-absorption#post-6249 Mon, 25 Dec 2017 18:39:45 +0000 babakkh 6249@http://www.k-wave.org/forum/ <p>Hi,</p> <p>I need to define absorption for part of my simulation domain.<br /> I am using medium.alpha_power the same for all domain and the medium.alpha_coeff is non-zero for the part of domain that must be absorbing.<br /> It works for high frequency sinusoidal sources but when the frequency of the source is low or it is broadband non-sinusoidal the absorption doesn't work. it seems there is leakage of acoustic energy to the absorbing domain. Would you please help me if k-wave can absorb non-harmonic or low-frequency excitation? </p> <p>Thanks,</p> <p>Babak </p>