+**Piezoelectricity** is the electric charge that accumulates in certain solid materials, like [Quartz](/wiki/quartz), in response to applied mechanical stress. This reversible effect means these crystals can also change shape when an [Electric Field](/wiki/electric_field) is applied, acting as tiny, precise actuators or [Sensors](/wiki/sensor) that bridge mechanical and electrical worlds. It quietly powers devices from lighters to sonar.
+## See also
+- [Transducer](/wiki/transducer)
+- [Ultrasound](/wiki/ultrasound)
+- [Crystal Oscillator](/wiki/crystal_oscillator)
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