Would be interesting to see the same thing, but in a room with the speakers in a reasonably normal position. Also with tones - say 50/100/200HzI will try and replicate this at home and post the result, the setting won’t be quite as scenic though.
Keith
Yes, used a lot for live sound, the Kiis,Gradient and 8Cs cardioid response is based through the mids, Geithain’s through the bass.
It is very worthwhile imho.
Keith