Old noise machinery
 

This is an article I found whilst browsing the net for acoustic horns.

"PROJECT 7: The gent on the left is Russolo, the Italian Futurist composer, proudly displaying his "noise-machines" or "intoners" (intonarumori), for use in his avante-garde musical compositions. Each made a preset "roaring, bubbling or bursting" noise when its handle was operated. In his often quoted manifesto from 1913, l'arte di rumori, Russolo proposed an Art of Noise. Good name for a band...
See Luigi Russolo and the Italian Futurists (external link)
Photo: Milan circa 1920."

http://en.wikipedia.org/wiki/Art_of_Noise