k-Wave

1. romy_budhi
   

   Member
   Joined: Jan '16
   Posts: 6

   Hello Dr. Brad, Dr. Cox, and all members,

   I tried to use directivity_angle field name in cartesian, the code is

   :
   :
   xPos = 30e-3;
   yPos = 50e-3;
   sensor.mask = [xPos;yPos];
   sensor.directivity_angle = 0; %pi/3
   sensor.record = {'p','p_final'};

   sensor_data = kspaceFirstOrder2D(kgrid, medium, source, sensor);

   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.

   b). And how to use directivity_angle in Source ? I want to give a special directivity in source as well as in sensor.
   Sorry for my English.
   Thank you

   Posted 8 years ago #

2. Bradley Treeby
   

   Developer
   Joined: Mar '10
   Posts: 1,643

   Hi romy_budhi,

   To use the directivity_angle input, you need to use a binary sensor mask (rather than a Cartesian sensor mask). You can convert from one to the other using cart2grid and grid2cart. 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.

   Hope that helps,

   Brad.

   Posted 8 years ago #

3. romy_budhi
   

   Member
   Joined: Jan '16
   Posts: 6

   Dear Dr. Brad,

   It is very helpful. I tried a source that have the same size of the physical transmitter. It works. Thank you very much.

   Best Regards,
   Romy

   Posted 8 years ago #

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