Electromechanical coupling coefficient

Electromechanical coupling coefficient is a numerical measure of the conversion efficiency between electrical and acoustic energy in piezoelectric materials.

Qualitatively the electromechanical coupling coefficient, k, can be determined as:

$\mathcal{K}^{-2} = \frac{1}{\mbox{ energy converted per input energy}}$

References

• "Electromechanical coupling coefficient". Medcyclopaedia. GE. Archived from the original on 2012-02-05.
• Vilnius University, Laboratory of Physical Acoustics