http://www.k-wave.org/forum/topic/performance-drop-using-different-directivity-angles Support for the k-Wave MATLAB toolbox en-US Tue, 12 May 2026 22:32:16 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/performance-drop-using-different-directivity-angles#post-7242 Thu, 27 Feb 2020 12:31:02 +0000 bencox 7242@http://www.k-wave.org/forum/ <p>Hi kdreher,</p> <p>Yes, that is a limitation of the approach we've used. The directivity of the sensing element is applied in k-space, which makes it very general - any directionality could in principle be modelled that way. However, it means that a separate fft is required for each different directivity used, which is why it slows down so much. A faster way to incorporate directionality - although with less flexibility - is simply to use several pixels added together as one sensing 'element'. </p> <p>Best wishes,<br /> Ben </p> http://www.k-wave.org/forum/topic/performance-drop-using-different-directivity-angles#post-7145 Fri, 06 Dec 2019 02:26:53 +0000 jackYANG 7145@http://www.k-wave.org/forum/ <p>Generally speaking, two-dimensional simulation is relatively fast,please show me your code for further communication. </p> http://www.k-wave.org/forum/topic/performance-drop-using-different-directivity-angles#post-7143 Tue, 03 Dec 2019 11:37:52 +0000 kdreher 7143@http://www.k-wave.org/forum/ <p>I'm doing a 2D simulation in which I defined 256 detector elements using the <code>sensor.mask</code> property. I arranged them in an arc shape and by using the <code>sensor.directivity_angle</code> property, I focussed them to the center of the circle. </p> http://www.k-wave.org/forum/topic/performance-drop-using-different-directivity-angles#post-7140 Sat, 30 Nov 2019 13:36:53 +0000 jackYANG 7140@http://www.k-wave.org/forum/ <p>Do you mean the defined 256 concave transducers?which are divided by angle? I have also recently worked on the circular concave phased array focusing, but I have 128 elements. Are you two-dimensional simulation or 3D simulation. If you can,share your code and communicate together will be better </p> http://www.k-wave.org/forum/topic/performance-drop-using-different-directivity-angles#post-7138 Fri, 29 Nov 2019 14:35:35 +0000 kdreher 7138@http://www.k-wave.org/forum/ <p>Hello,</p> <p>I wanted to do a simulation, for which I defined an arc-shaped detector geometry in a sensor mask with 256 elements. Using a sensor directivity angle mask, I encountered a drop in calculation speed using different angles for every single one of 256 detector elements (focus on the center of the circle). It turns out, that this simulation took about 25 times longer than a simulation which had only one directivity angle for all the detector elements or compared not settings angles at all so that the elements were omnidirectional. </p> <p>Do you use some techniques in your code that enable a faster calculation if all the angles are the same?<br /> If yes, what do you propose I should do if I want to keep the focus on the center of the circle?</p> <p>Sincerely,<br /> Kris </p>