Hello,
everyone, using far- field calculation to compute band width, however I don not know how to postprocess the data obtain from the polar plot data?
Thank you all!
Hi
The far-field results in COMSOL Multiphysics is not limited to polar plot data only. You can also assess them in 2D plots e.g., although this is not obvious.
You can type abs(pfar(0[m],1[m])) to evaluate the absolute value of the far-field in coordinate (0,1). Here I asssume axisymmetry, so that I am looking at a point 1 m on-axis. For 3D just enter the desired coordinates (x,y,z).
So now you can easily plot the bandwidth or what I assume is the sound pressure level in a point as a function of frequency: Just define a variable called e.g. "SPL" (for sound pressure level) and type 10*log10(0.5*pfar(1[m]*sin(0[deg]),1[m]*cos(0[deg]))*conj(pfar(1[m]*sin(0[deg]),1[m]*cos(0[deg])))/(20e-6)^2). You are looking at a point 1 m on-axis, but you can adjust to whichever point you like. Create a plot and evaluate the variable SPL.
René
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