Journal article
The influence of spatial polarization distribution on spot poled PVDF membrane hydrophone performance
Ultrasound in medicine & biology, v 18(6), pp 625-635
1992
PMID: 1413274
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The influence of spatial polarization distribution on spot poled PVDF membrane hydrophone performance was calculated and then experimentally verified using a one-dimensional model based on acoustic wave propagation through a layered medium. It is shown that the sensitivity of the hydrophone is markedly dependent on the spatial polarization distribution. It is also shown that there can be a significant difference between the voltage sensitivities measured in the same hydrophone probe depending on which electrode is actually facing the acoustic source. The measurements carried out in the frequency range 1–20 MHz indicate that this difference, while negligible below 2 MHz, may exceed 1.6 dB at higher frequencies. The model developed can also be used to determine the “effective” piezoelectric constant d
33 of the PVDF material as a continuous function of frequency. Moreover, the model predicts the existence of a negative slope in the frequency response of the spot poled membrane hydrophone. The experimental confirmation of this prediction underscores the importance of using swept frequency methods during calibration measurements.
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Details
- Title
- The influence of spatial polarization distribution on spot poled PVDF membrane hydrophone performance
- Creators
- B. Fay - Physikalisch-Technische BundesanstaltP.A. Lewin - Drexel UniversityG. Ludwig - Physikalisch-Technische BundesanstaltG.M. Sessler - TU DarmstadtG. Yang - TU Darmstadt
- Publication Details
- Ultrasound in medicine & biology, v 18(6), pp 625-635
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- School of Biomedical Engineering, Science, and Health Systems; Mathematics
- Web of Science ID
- WOS:A1992JM76400011
- Scopus ID
- 2-s2.0-0026688570
- Other Identifier
- 991019174898504721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Acoustics
- Radiology, Nuclear Medicine & Medical Imaging