Bias voltage applied to nearly incompressible dielectric membranes like silicone rubber produces measurable voltage signals from dynamic pressure via induced electro-mechanical coupling and capacitance variation.
However, the mechanism at the base of the observed flow of current is different than in piezoelectric crystals with spontaneous electric dipoles
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Pressure sensing by electro-mechanical coupling in compliant dielectric membranes polarized by a bias voltage
Bias voltage applied to nearly incompressible dielectric membranes like silicone rubber produces measurable voltage signals from dynamic pressure via induced electro-mechanical coupling and capacitance variation.