Yes, it looks like an interferometer. The microphone array looks very symmetric, and usually with radio interferometer's you set up the antennas to not be symme

Yes, it looks like an interferometer. The microphone array looks very symmetric, and usually with radio interferometer's you set up the antennas to not be symmetric, in order to prevent ringing (ie areas on the sky where you get very good signal, and other area's where you get very poor signal. With a circular aperture, you'd get a response function resembling a Bessel function). So I wonder if they could get better results with a less symmetric microphone array. Hmm... Or maybe the array is large enough that the entire court is inside the central spot, meaning all the ringing is outside the court. I'll have to think about that.