As I find photos that I think may be of interest, I'll put them here. If you click on the photo, you'll get a bigger version of it. Or, clicking may bring you a webpage with more info about that photo. If you click on a selection in the Index, you'll jump to that topic.
Index:
As an organbuilder, we need a way to measure the church acoustics. We are interested in how much acoustical power is lost between the source (the organ) and the listener. More exactly, We want to know the decibel loss between the source (near field) and the Hall Radius. Its actually quite easy to quantify, its only physics; all you need is a measuring tape, smart phone and a spreadsheet.