Bird, I laugh to think of the story my dad told me about one of the big pump stations on a main Magnolia Pipeline Company pipeline N-S through midwest (northern terminus was at Lima, Ohio.) The pump station involved was powered by several quite large diesel engines running 24-7 and making quite a noise that carried quite a ways. When the whole operation was shut down for a couple days they got a lot of complaining phone calls from folks whose sleep was disturbed by the lack of the sound of the station. I suppose it masked random night noises and gave a smooth noise background that was easy to get used to but when it was stopped the residents could hear every car door, front door, dog bark, owl hoot, night bird, etc. and not being used to the "normal" night sounds were bothered by it.
Pat [img]/forums/images/icons/smile.gif[/img] [img]/forums/images/icons/smile.gif[/img]