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.
• Vilnius University, Laboratory of Physical Acoustics