How can design a circular array for sound beamforming application?

Topic:acoustic beamforming and image generation.

In phased array toolbox ,there are linear,rectangular array and I can localize the sound sources using these. But I have to localize sound sources using a circular array. Is there any solution to derive a circular array ?

Answer 1

[Honglei Chen]

Hi Syamesh,

Here is an example for producing a circular array. It is actually from the command line help of phased.ConformalArray

    ha = phased.ConformalArray;
    N = 8; azang = (0:N-1)*360/N-180;
    ha.ElementPosition = [cosd(azang);sind(azang);zeros(1,N)];
    ha.ElementNormal = [azang;zeros(1,N)];

You can look at its response using the following code

    fc = 1e9; c = 3e8;
    plotResponse(ha,fc,c,'RespCut','Az','Format','Polar');

HTH and please let me know if you need any further clarifications.