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The essence of my first question is when does LF turn from 2PI to 4 PI.
In my imagination significant curved surfaces on the edges of a baffle lower 2PI just like wings on a baffle.
The essence of my first question is when does LF turn from 2PI to 4 PI. Does sound follow the counters of the baffle or the extremes of the length and width?
It was your recent paper outlining the advantaged of ob subs near field that caused me to reconsider.