Originally Posted by Benmrx
I feel like I've always had a somewhat decent understanding on polar patterns, but I've never heard that a good LDC omni, will not be as true of a polar pattern than a SDC omni.
Would love to hear some more on this subject.
The polar pattern on most LDC's are made by adding two cardioid patterns together in various combinations. Cardioid mics get more directional with frequency, so the pattern becomes omni for low frequencies, and towards high frequencies starts to look more like someone took a belt around the middle of the pattern and started tightening it... sort of like a figure-8 but without the null. I dunno how to describe it better. The size of the front and back also depends on tolerances of the sensitivity of the mic, and that may be up to a 1 to 2 dB error in matching, and that can affect the sound and directionality of the mic in anything other than cardioid or figure-8. Figure-8 appears to be much more tolerant of capsule manufacturing tolerances and much more consistent on a multipattern LDC when compared to omni.