If 10 people are in conf room, a person any where in the room can hear well. But if we keep a phone (say polycom), it does not receive well. party on the phone can't hear many people in the room.

Which means, human ear's sensitivity diagram (polar plot) is much superior over best phone available today.

One reason is Pinna (outer ear of human) is very well designed to receive audio from any direction (very good wave guide design).

May be we should follow god's design first. And replicate same Pinna shape and wave guide structure and place a mic in the place of tympanic membrane (ear drum). Then plot the Polar diagram to understand the sensitivity pattern improvement.

Note: We can also explore ear structure of best listening creature on earth. which Designed and developed by god !!!