http://www.k-wave.org/forum/topic/directivity_angle-fieldname Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 03:09:31 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/directivity_angle-fieldname#post-5435 Mon, 21 Mar 2016 09:56:09 +0000 romy_budhi 5435@http://www.k-wave.org/forum/ <p>Dear Dr. Brad,</p> <p>It is very helpful. I tried a source that have the same size of the physical transmitter. It works. Thank you very much.</p> <p>Best Regards,<br /> Romy </p> http://www.k-wave.org/forum/topic/directivity_angle-fieldname#post-5424 Thu, 17 Mar 2016 13:26:47 +0000 Bradley Treeby 5424@http://www.k-wave.org/forum/ <p>Hi romy_budhi,</p> <p>To use the <code>directivity_angle</code> input, you need to use a binary sensor mask (rather than a Cartesian sensor mask). You can convert from one to the other using <code>cart2grid</code> and <code>grid2cart</code>. It's not possible to define the directivity of sources in this way. However, a simple way to model directivity is to use a source mask that is the same size as your physical source. Most of the examples under the "Sensor Directivity" heading in k-Wave model directivity in this way.</p> <p>Hope that helps,</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/directivity_angle-fieldname#post-5405 Sat, 27 Feb 2016 09:05:10 +0000 romy_budhi 5405@http://www.k-wave.org/forum/ <p>Hello Dr. Brad, Dr. Cox, and all members,</p> <p>I tried to use directivity_angle field name in cartesian, the code is </p> <p>:<br /> :<br /> xPos = 30e-3;<br /> yPos = 50e-3;<br /> sensor.mask = [xPos;yPos];<br /> sensor.directivity_angle = 0; %pi/3<br /> sensor.record = {'p','p_final'};</p> <p>sensor_data = kspaceFirstOrder2D(kgrid, medium, source, sensor);</p> <p>a). However an error message "sensor.directivity_angle and sensor.mask must be the same size" appeared. Would you help how to use this fieldname in cartesian please.</p> <p>b). And how to use directivity_angle in Source ? I want to give a special directivity in source as well as in sensor.<br /> Sorry for my English.<br /> Thank you </p>