Hi. This software looks so promising! Thanks.
However, when I calculated the true field pattern (using O'Neil's method, for example) of the transducer in the example "Simulating transducer field patterns" , I get a field with far more lobes and nearfield maxima (and less strong) than the K-Wave results. Also, the K-Wave output shows maxima and minima on the surface of the transducer - where it is supposed to be constant.
Any insights would be appreciated!
Thanks,
Andy
k-Wave
A MATLAB toolbox for the time-domain
simulation of acoustic wave fields
focused field example is innacurate?
(7 posts) (2 voices)-
Posted 7 years ago #
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p.s. why does increasing Nx and Ny change the field shape on this example?
Posted 7 years ago # -
Hi Andy,
This example is in 2D, so you will get a different field compared to the O'Neil solution. An arc in 2D is equivalent to a cylindrically focused rectangle in 3D (think of the arc infinitely extended out of the page).
If you define a focused bowl, k-Wave should give very good agreement. See this paper for an example which compares k-Wave with the O'Neil solution and experimental measurements made using a focused bowl transducer.
Brad.
Posted 7 years ago # -
Thanks Brad. Oh yeah, 2-d.
What about the change caused by increase in Nx and Ny?Thanks for the paper link. Interesting - the H101 was the same transducer I modeled a lot in my grad work.
-AndyPosted 7 years ago # -
p.s. my full name is Andrew Draudt
Posted 7 years ago # -
Oops. Now I see. It's because the makeCircle command is entered in units of grid points.
Posted 7 years ago # -
Hi Andrew,
Glad you managed to figure it out!
Brad.
Posted 7 years ago #
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