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=1 energy converted per input energy

## References

* "Electromechanical coupling coefficient". GE. http://www.medcyclopaedia.com/library/topics/volume_i/e/ELECTROMECHANICAL_COUPLING_COEFFICIENT.aspx.
* Vilnius University, Laboratory of Physical Acoustics

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