k-Wave

1. AlessandroPolo
   

   Member
   Joined: Jul '17
   Posts: 1

   Hi Everyone!
   I was wondering if there is a way to compute the acoustic far field from an acoustic pressure collected by a line detector.
   Does anyone have an answer to that?

   regards

   Alessandro

   Posted 6 years ago #

2. Bradley Treeby
   

   Developer
   Joined: Mar '10
   Posts: 1,640

   Hi Alessandro,

   Do you mean numerically? If so, then this would be possible using k-Wave. I'd suggest working through the examples and the k-Wave manual. After that, it should be clear how to set up a simulation with a line detector (if it's infinite, you could use a point detector in 2D).

   Brad.

   Posted 6 years ago #

3. inzunzam.marco
   

   Member
   Joined: Jan '17
   Posts: 1

   Hi Bradley,

   I have a question regarding a PA source in 2D. I noticed that I need to place a source (say a 100 micron disc) far in the field so that I get the correct reconstructed (DAS) image from a linear array of sensors. The reconstruction becomes distorted the closer I place the source in space to the sensor array.

   This makes my grid size and computation time significantly large. Is there any way to setup the simulation with the far field condition so that I can reduce the grid points between my source/receivers?

   Thank you,
   Marco

   Posted 2 years ago #

4. Bradley Treeby
   

   Developer
   Joined: Mar '10
   Posts: 1,640

   Hi Marco,

   There is no way in k-Wave at least to directly compute the far-field without running the wave through the intervening grid points. One possibility might be to use another tool or analytical expression, and then input this into k-Wave across a plane as a Dirichlet boundary condition.

   Brad.

   Posted 2 years ago #

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