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- W2040478507 abstract "A common design of a sound-pressure hydrophone relies on two bimorph piezoelectric circular plates symmetrically attached to a common base in the form of a ring or cylinder. This may be considered as having two inertially coupled partial systems vibrating in symmetrical and antisymmetrical modes. The symmetrical mode corresponds to the in-phase electrical connection of plates (hydrophone) and provides an output proportional to the omnidirectional sound pressure. The antisymmetrical mode corresponds to antiphase electrical connection of the plates and provides the figure-eight output proportional to the gradient of the pressure field. In order to make the electromechanical frequency responses of partial systems identical, the coupling between these systems must be made as small as possible. This can be achieved by proper design of the common base and achieving immunity to unwanted actions. The sound-pressure hydrophone should be insensitive to acceleration caused by the pressure gradient and the pressure-gradient hydrophone should be insensitive to sound pressure. The properties of a combined hydrophone and the procedure of plate equalizing are investigated. The experimental data obtained are in a good agreement with theoretical expectations." @default.
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- W2040478507 date "2000-05-01" @default.
- W2040478507 modified "2023-09-24" @default.
- W2040478507 title "Combined sound‐pressure and pressure‐gradient hydrophone design" @default.
- W2040478507 doi "https://doi.org/10.1121/1.429173" @default.
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