Evaluation of a novel solid-state method for determining the acoustic power generated by physiotherapy ultrasound transducers.

@article{Zeqiri2008EvaluationOA,
  title={Evaluation of a novel solid-state method for determining the acoustic power generated by physiotherapy ultrasound transducers.},
  author={Bajram Zeqiri and Jill Barrie},
  journal={Ultrasound in medicine & biology},
  year={2008},
  volume={34 9},
  pages={
          1513-27
        }
}
A new secondary method of determining ultrasound power is presented based on the pyroelectricity of a thin membrane of the piezoelectric polymer, polyvinylidene fluoride (PVDF). In operation, the membrane is backed by a polyurethane-based rubber material that is extremely attenuating to ultrasound, resulting in the majority of the acoustic power applied to the PVDF being absorbed within a short distance of the membrane-backing interface. The resulting rapid heating leads to a pyroelectric… CONTINUE READING
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