From the patterns is seems the loudest part is outer circle. There is a 5db decrease with each inner circle.
Is that correct or other way around?
Edit and follow up question:
Is there a way to calculate the distance from microphone edge to this
-5 db most sensitive spot?
People give advice like talk from 6-12 inch away in front of microphone.
Does that come from experience or any way to measure the spot?