9
Analyse measurements
45
Figure 48: Frequency-energy-graph (example 3)
The third example is shown in figure
. There are some higher measured values just next to
each other. The average value is relatively high. It is recommended to repeat the measurment
at the specific measured point to concretize these measurement results. The yellow point inside
the diagram indicates that there may be no discoveries at this place to be expected.
Figure 49: Frequency-energy-graph (example 4)
In figure
the maximum value is much higher and the amplitude of neighbor values is small.
A subterranean structure may be expected. Nevertheless the average value could be much more
lower to give a correct statement.
Figure 50: Frequency-energy-graph (example 5)
The last example shown in figure
indicates a very good measurement result. There is a high
maximum value without much scattering and the average value is very low. The green point
indicates that a traget object is quite possible.
In summary the following aspects can be said to find hidden cavities:
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