"A thick water pipe stuck out of the wall. When I struck with my flat hand against
the end I generated a deep sound. A simple way to produce a sound! Initially I had
also worked with water pipes. In the course of time the last Wopper emerged: long
sound bells generate sound through very short air impulses."
1996 / 2014
Roaring deep Wopp sounds are generated through sudden interruption of the air stream.
The last version of the Wopper emerged quite late in 2014.
Material: 8 valves, steel, synthetic water pipe or conical led pipe
Weight: 25 kg
length 300cm [=9.8 ft] x height 140cm [=4.6 ft]