http://www.k-wave.org/forum/topic/how-to-observe-the-change-in-density-effect-in-pa-signal-or-its-spectrum Support for the k-Wave MATLAB toolbox en-US Tue, 12 May 2026 23:09:40 +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-observe-the-change-in-density-effect-in-pa-signal-or-its-spectrum#post-7684 Fri, 03 Jul 2020 07:05:12 +0000 abhijeet_gorey 7684@http://www.k-wave.org/forum/ <p>Hi Brad,<br /> Thanks for your reply. Actually I wish to identify the change in mechanical properties of the sample by looking into the Photoacoustic signal/ spectra changes. For that, I wish to simulate and observe the change in PA signal/spectra if the density of the sample is changed. What is the possible way of doing it? </p> http://www.k-wave.org/forum/topic/how-to-observe-the-change-in-density-effect-in-pa-signal-or-its-spectrum#post-7651 Sat, 27 Jun 2020 13:10:41 +0000 Bradley Treeby 7651@http://www.k-wave.org/forum/ <p>Hi Abhijeet,</p> <p>In a homogeneous medium, the propagation of an acoustic wave doesn't depend on the density, just the sound speed. If you look at <a href="http://www.k-wave.org/papers/2005-Cox-JASA.pdf">this paper</a>, you'll see that the density doesn't enter into the governing equations. </p> <p>Does that help?</p> <p>Brad </p> http://www.k-wave.org/forum/topic/how-to-observe-the-change-in-density-effect-in-pa-signal-or-its-spectrum#post-7621 Wed, 17 Jun 2020 08:32:56 +0000 abhijeet_gorey 7621@http://www.k-wave.org/forum/ <p>Hii,<br /> I am new to k-wave simulations. I went through the manual and documentation and tried out several examples. I wish to know how to observe the change in medium-density in the PA signal. When I am changing the density value I cannot find any change in PA signal or its spectra. Can someone please help.</p> <p>Thanks.<br /> Abhijeet </p>