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- W4233035115 abstract "This article describes some of the design, construction, and rest-performance details of a small, low-frequency, omnidirectional, broad-band hydrophone. The design was of such nature that the hydrophone should withstand high-velocity water impact shock, have a minimum sensitivity of −100 dB relative to 1 V/μbar for the frequency range 10 Hz to 2 kHz, have a minimum capacitance of 10 nF, and be omnidirectional in all planes to 2 kHz. A radially polarized PZT-5H piezoelecrtic ceramic tube with end caps and an internal air cavity was cast in a polyurethane compound. This particular piezoelectric material has a high permittivity, so the minimum capacitance could be obtained within the maximum physical dimensions. The mounting of the ceramic tube is described in which two beryllium copper springs are used to aid in positioning and cushioning the brittle ceramic, and to provide electrical contact to the inside and outside silver-filmed electrodes of the tube. Some of the properties of the hydrophone that are shown are the capacitance-temperature relationship, admittance versus frequency for air and water loading, and directivity patterns. The hydrophone was shown to be omnidirectional in all planes up to 5 kHz." @default.
- W4233035115 created "2022-05-12" @default.
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- W4233035115 date "1968-12-01" @default.
- W4233035115 modified "2023-10-18" @default.
- W4233035115 title "Small, Low-Frequency, Omnidirectional, Broad-Band Hydrophone" @default.
- W4233035115 doi "https://doi.org/10.1121/1.1911316" @default.
- W4233035115 hasPublicationYear "1968" @default.
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