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AN INNOVATIVE APPROACH TO SPATIAL FILTERING WITH PIEZOELECTRIC FILMS FOR VIBROACOUSTIC APPLICATIONS

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Figure

Figure 1: Representation of the spatial filter using  n discrete sensors.
Figure 2: Example of modal filter achieved with a discrete array sensor (rectangular plate with an array of 4 × 8 piezoelectric patches)
Figure 3: (a) Porous electrode, (b) detail of the motif with variable porosity, (c) double sided motif (fraction of electrode area = 50 %), (d) single sided motif (the other electrode is continuous)
Figure 4: Sample of piezoelectric film polarized in the direction normal  to its plane and subjected to plane strains along the orthotropy axes
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