Piezoelectricity — perhaps one of the most underrated technologies ever developed. You use it every time you turn on your stove and it is the thing that keeps your quartz watch tracking time.

School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, China ...

That’s a phenomenon called the piezoelectricity effect, and it allows certain materials to generate an electric charge in response to applied mechanical stress. The output voltages from upper, mid, ...