  SPIRAL2 is a superconducting LINAC subject to cryogenic thermo-acoustic
oscillations occurring in its valves-boxes. 4 years of monitoring and
experimental investigations with thousands of datasets turned these unwanted
effects into an opportunity to study and understand thermo-acoustics in a
complex environment such as a real life accelerator. Without digging deep into
Rott's thermo-acoustics theory, thoroughly shown in other works, this paper
describes the instrumentation and the methods that prepare more advanced
modelling of these phenomena either to damp or to harness the energy of
cryogenic thermo-acoustics.
