Varieties in results obtained from similar wave distribution experiments in light of environment's geometry have been
subjects of many studies. One such difference has been observed while using small coupons or belts as experiment
samples in comparison with bigger sheets in industrial scale. The difference in question is perhaps more noticeable here
than in any other application.
A principal contributor to the existence of such differences is known as Back Wall effect. This phenomenon, in
addition to strengthening the signal energy and increasing the number of peaks with same thresholds of signal recording,
changes the frequency content of the analyzed signal within the designated time frame.
In this investigation, simulation of similar conditions are carried out by generating acoustic waves within an
aluminum sheet to study the Back Wall effect received from the outermost wall through wavelet analysis. Obtained
results from this investigation however, will not only be limited to small coupons or belts alone. They are extendable to
long sheets at the time of sensor installation at sidewalls.