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Fault detection in rotating machinery using acoustic emission

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Figure

Figure 2-3: Example of the graph produced in the attenuation test.
Figure 2-4: Example of burst signals compared to a continuous emission of acoustic waves [27]
Figure 3-3: Graphical explanation of (a) SAM and (b) parallel misalignment.
Figure 4-1: Graphical explanation of the modulation produced by a defected bearing and the  envelope extraction
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