i was walking home from the centre a few weeks back when i passed by a collection of art installations / weather machines. they are just to the south of töölölahti beside the train tracks and (temporary) skate ramp. the top photo and the bottom left photo are of a machine called “menninkäisten yösoitto” (a very rough translation i think is ‘pixies night ring”. the inner part of the piece was turned by the wind and produced random ringing, really nice. here is a sample:

20040819.04.wav : 28sec : 300kb

the piece on the bottom right is (i think) called “tuulispää” (gust of wind) and is also by the same artist : antti maasalo.