http://www.k-wave.org/forum/topic/multiple-sources-mapped-simultaneously Support for the k-Wave MATLAB toolbox en-US Tue, 12 May 2026 23:38:58 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/multiple-sources-mapped-simultaneously#post-837 Tue, 23 Oct 2012 00:37:34 +0000 Bradley Treeby 837@http://www.k-wave.org/forum/ <p>Hi Steve,</p> <p>If your <code>source.p_mask</code> has two source points, you could define the input signals as:</p> <pre><code>source.p(1, :) = sin(2*pi*source_freq1*kgrid.t_array); source.p(2, :) = sin(2*pi*source_freq2*kgrid.t_array);</code></pre> <p>Similarly for more source points or more complicated driving signals.</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/multiple-sources-mapped-simultaneously#post-836 Mon, 22 Oct 2012 18:53:09 +0000 s_roessner 836@http://www.k-wave.org/forum/ <p>Thank you! I got the multiple points to work, however, I may have phrased my question wrong about the varying frequencies.</p> <p>How can I define one source to hold one freq., say 500Hz, and another separate point on the other side of the plate to be driven at 2Khz?</p> <p>Thanks again,<br /> Steve </p> http://www.k-wave.org/forum/topic/multiple-sources-mapped-simultaneously#post-835 Mon, 22 Oct 2012 18:16:42 +0000 Bradley Treeby 835@http://www.k-wave.org/forum/ <p>Hi Steve,</p> <p>The way to do it is to define a single binary source mask the same size as the computational grid, where the 1's indicate all the grid points that will act as source points. Assuming you are defining a pressure source, you can then assign different time series inputs for each source point to <code>source.p</code> (in your case, these could be sinusoids at different frequencies). The source matrix is indexed as <code>source.p(source_point_index, time_index)</code>, where the ordering of the source points within the grid follows MATLAB's column-wise linear indexing. </p> <p>If you want to define different frequency sources at the same grid point, just add the source signals together.</p> <p>I hope that helps, let us know if you can't get it working!</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/multiple-sources-mapped-simultaneously#post-834 Mon, 22 Oct 2012 17:31:34 +0000 s_roessner 834@http://www.k-wave.org/forum/ <p>Hello,</p> <p>I am curious if there is a way to allow for multiple monopole sources with varying frequencies to be mapped to the grid simultaneously.</p> <p>Right now, I am attempting to define separate source masks for each source, however it still only provides the first source.</p> <p>Any suggestions would be welcome!</p> <p>And by the way, thanks for the toolbox!</p> <p>Best,<br /> Steve </p>