http://www.k-wave.org/forum/topic/defining-an-acoustic-source-using-displacement-instead-of-pressure Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 11:32:29 +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-an-acoustic-source-using-displacement-instead-of-pressure#post-7142 Mon, 02 Dec 2019 01:39:39 +0000 keith_murphy 7142@http://www.k-wave.org/forum/ <p>Hi Andres,<br /> Were you able to work this out programatically? I'm interested in doing the same thing but don't have enough of a mathematics background to get it going and was hoping you might be able to help. Thanks</p> <p>Keith </p> http://www.k-wave.org/forum/topic/defining-an-acoustic-source-using-displacement-instead-of-pressure#post-6238 Tue, 12 Dec 2017 23:08:16 +0000 Bradley Treeby 6238@http://www.k-wave.org/forum/ <p>Hi Andres,</p> <p>You can convert displacement to velocity by taking the derivative. There are many numerical approaches you could take to do this, for example, using the <code>gradientFD</code> or <code>gradientSpect</code> functions in k-Wave.</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/defining-an-acoustic-source-using-displacement-instead-of-pressure#post-6224 Fri, 08 Dec 2017 15:12:11 +0000 AndresMM 6224@http://www.k-wave.org/forum/ <p>Hi everyone,</p> <p>the most straightforward way to define an acoustic source is to either define an initial pressure or a time-varying pressure.</p> <p>Is it possible to define the source by taking into account the displacement of the source (i.e. amplitude of ultrasound transducer vibration)?</p> <p>I would assume this is related to the third possibility of source-definition according to the manual; a time-varying velocity. How could the amplitude displacement be "translated" into velocity? For example, let's say a transducer has a vibration amplitude of 10 nm and a frequency of 100 kHz, would this correspond to:</p> <p>10 nm * 100e3 (1/s) = </p> <p>source.u = 1e6 m/s </p> <p>Cheers,<br /> -A </p>