Equality of the energy and group velocities of bulk acoustic waves in piezoelectric media

@article{Laude2005EqualityOT,
  title={Equality of the energy and group velocities of bulk acoustic waves in piezoelectric media},
  author={Vincent Laude and Alexandre Reinhardt and Abdelkrim Khelif},
  journal={IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control},
  year={2005},
  volume={52},
  pages={1869-1871}
}
The equality of the energy and group velocities of bulk acoustic waves in a lossless piezoelectric medium is demonstrated, with the energy velocity defined from the generalized energy density and the generalized Poynting vector. 
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Acoustic Fields and Waves in Solids

  • B. A. Auld
  • New- York: Wiley,
  • 1973
Highly Influential
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