This is only 90% OT ! I wonder if anyone has any idea what one of my close
neighbours has in his/her bedroom which whines at high pitch for minutes on
end most evenings. Once while lying in bed with the windows in summer mode,
I thought I was suffering from tinnitus. It isn't loud, but it is ...
penetrating. Very constant, finally winding down in pitch then off. Any
ideas?

Dave W.