A farm near to where I grew up had a gate made of tubular metal. On the underside of the bars were a number of small holes. When the wind blew past, which is most of the time, as it was close to our favourite kite flying hill, it produced a most eerie sound. It was not loud, but consisted of an assortment of whisted notes, which altered in pitch slightly depending on hor fast the wind blew across a particular hole. It is an enduring memory of my childhood.
It is not an Aeolian Harp, but perhaps it could be the Aeolian Gate?
Quack
Geoff the Duck.