Why is the resolution so much fixed to the number of mics? Shouldn't 3 mics be somewhat sufficient for intermediate values as well? More mics => more redundanc

Why is the resolution so much fixed to the number of mics? Shouldn't 3 mics be somewhat sufficient for intermediate values as well? More mics => more redundancy => clearer image of the waves, but why do the pixels/blobs "snap" to a microphone? edit: ah, he does not use timing (at 10fps obviously not) but needs continuous sound to see the wave pattern across the array... edit 2: so do these gunfire locators¹ only time stamp impulses? Or do they do continuous analysis? With natural, irregular sound, it should be possible to match and measure the delay between mics, no? edit 3: the gunfire locators would need to analyze for gunfire characteristics anyways, to weed out false positives, but that could be separated from the locating. edit x: oh cool, if you zoom out of the final picture so it's smaller on screen, you can even see some parallax effect happening: http://206hwf3fj4w52u3br03fi242.wpengine.netdna-cdn.com/wp-content/uploads/2016/06/4x4.gif http://206hwf3fj4w52u3br03fi242.wpengine.netdna-cdn.com/wp-c... ¹ http://wordpress.mrreid.org/wp-content/uploads/2013/06/boomerang-mounted.jpg http://wordpress.mrreid.org/wp-content/uploads/2013/06/boome...