http://www.k-wave.org/forum/topic/delay-times-of-transducer Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 01:47:04 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/delay-times-of-transducer#post-5484 Fri, 29 Apr 2016 10:57:32 +0000 Bradley Treeby 5484@http://www.k-wave.org/forum/ <p>Hi maryam,</p> <p>The simple formula contained within the <code>kWaveTransducer</code> class assumes a homogeneous value of sound speed (set by <code>transducer.sound_speed</code>). There are many ways you can focus in a heterogeneous medium, e.g., using time reversal, time-of-flight phase offsets, average sound speed along a ray path etc etc. Probably the easiest way to implement these is to use <code>source.p_mask</code> and <code>source.p</code> (rather than <code>makeTransducer</code>) so you can directly control the signal used to drive each grid point of the source.</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/delay-times-of-transducer#post-5477 Tue, 26 Apr 2016 13:08:54 +0000 maryam.parto 5477@http://www.k-wave.org/forum/ <p>Hi</p> <p>I am trying to focus at a point in heterogeneous medium. I used maketransducer function and transducer.beamforming_delays to get delay times but they are similar to what I have in homogenous medium. I guess that k-wave uses a formula that doesn’t take into account the different acoustic sound speeds in medium. Please help me How can I consider the different medium to calculating delay times in my code?</p> <p>Thanks </p>