Time-domain pressure of a spherically curve wedge transducer
The electrode patterns of a spherical cap transducer are often created from combinations of annular rings and wedges, where a wedge is formed by making a cut in the spherical cap parallel to its diameter when viewed along the axial direction. We present a technique calculate the time-domain pressure...
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Published in | IEEE Symposium on Ultrasonics, 2003 Vol. 2; pp. 1634 - 1637 Vol.2 |
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Main Authors | , |
Format | Conference Proceeding |
Language | English |
Published |
IEEE
2003
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Subjects | |
Online Access | Get full text |
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Summary: | The electrode patterns of a spherical cap transducer are often created from combinations of annular rings and wedges, where a wedge is formed by making a cut in the spherical cap parallel to its diameter when viewed along the axial direction. We present a technique calculate the time-domain pressure of a wedge transducer using the spatial impulse response (SIR) method. Analytic expressions are derived to find the SIR at any point P in the sound field. Convolving the SIR at P with the acceleration of the transducer surface yields the time-domain pressure waveform at experimental hydrophone measurements of a wedge transducer operated at 4.7 MHz having a geometric focus of 9 cm and an outer diameter of 8 cm. Good agreements was observed between the experimental and theoretical 3-dB beamwidths. The utility of the wedge SIR model is that it can be used in a modular fashion with well-known spherical cap SIR model to expedite beam computations of novel transducer designs. |
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ISBN: | 0780379225 9780780379220 |
DOI: | 10.1109/ULTSYM.2003.1293223 |