On 12/14/16 08:25, Andre Jute so wittily quipped:
For a Bessel Array, try the brief introduction he
http://www.audio-talk.co.uk/fiultra/...n%20BESSEL.htm
too brief, though you piqued my curiosity.
Then I went he
http://www.angelfire.com/sd/paulkemble/soundf.html
and my curiosity 'peaked'. Interesting, but why do you WANT "that much"
sound pressure now?
my ears bleed just thinking about it...