"Jim Lesurf"

In principle you can get two pressure-sensing mics and place them slightly
apart. Then connect so that their outputs 'cancel'. This produced a setup
that outputs the 'differential' in pressure along the direction between
them. So gives a cardiod-ish shape.

** Read like a non sequitur to me.

A pair of OOP omnis simply has no output to sounds arriving from any
distance.

Nothing like a cardiod.

Jim can cite a contrary reference - any time he likes.

No thought experiments - PLLLEASE !




..... Phil