The Intonarumori is a family musical instruments invented in 1913 by Italian Futurist painter and musical composer Luigi Russolo. They were acoustic noise generators that permitted to create and control in dynamic and pitch several different types of noises. The invention of the intonarumori was the natural outcome of Russolo's musical theories expounded in his 1913 manifesto L'art dei rumori (The Art of Noise) in which he presented his ideas about the use of noises in music.

For the Scholar On Stage project, a collaboration between De Veenfabriek and the Art History Department of Leiden University, Der Wexel reconstructed some Intonarumori based on patents, information from museum depots, and letters from Russolo to Pratella. What originally seemed to involve a philosophical investigation into the effect of Helmholtz's On the Sensations of Tone on early-electronic music was actually realised with a orchestra consisting of twelve Sirens and six Intonarumori. The sirens have been developed and built by Rene Bakker. Leading composers have been invited to compose works for this unique orchestra. The Siren Orchestra played new works by David Behrman (USA), John Butcher (UK), Yannis Kyriakides (NL, UK, CY), Paul Koek and Martijn Padding (NL). Inspired by his reconstruction work,

Der Wexel carries out parallel research into sound and shape. He builds new sound machines in wich the visual aspect, the object, is a major principle.