[el`Ol]

Hello all!

According to Dr. Griffin`s paper, if I understand it right, there is no sensitivity gain (1W,1m) caused by the cylindrical vs. sperical radiation pattern, which I find strange.
Did the following calculation:
Surface of a sphere: 4 r^2 pi
Surface of the cylinder segment covered by an individual driver: 2 r pi d (d=driver spacing)
Ratio at 1m: 2m/d
Converted into dB (10 log(x)) should give the sensitivity gain at 1W,1m.

Is there anything wrong about that calculation?

Oliver

[el`Ol]

Read it again and found Dr. Griffin says it`s 10 log (number of drivers used), but this still sounds strange to me, especially for very long arrays.

[el`Ol]

Maybe it`s quite simple:
When the typical height of an array is 2m, then 2m/d is really the number of drivers used.