Electromechanical coupling coefficient

The 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 described as:

$k^{-2}=\frac{1}{\text{ energy converted per input energy}}$

References

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• Vilnius University, Laboratory of Physical Acoustics

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