John C. Cochran - Introduction to Sonar Transducer Design

5 Chapter 5Figure 5.1-1 A simple equivalent circuit for a piezo‐ceramic hydrophone.Figure 5.1-2 An abbreviated simple equivalent circuit for a piezo‐ceramic hy...Figure 5.1-3 A typical receiving voltage sensitivity (RVS) response of a bro...Figure 5.2-1 Ambient noise spectrum.Figure 5.2-2 Series equivalent noise source for a noisy resistive element.Figure 5.2-3 Parallel equivalent noise source for a noisy resistive element....Figure 5.2-4 Ambient noise in a sensor‐equivalent circuit.Figure 5.2-5 An equivalent circuit of a typical hydrophone with noise source...Figure 5.2-6 Preamp noise equivalent circuit.Figure 5.2-7 A typical preamp voltage noise spectrum. The current noise is I Figure 5.2-8 An equivalent circuit of a typical hydrophone and preamp system...Figure 5.2-9 Preamp noise equivalent circuit at frequencies well below the s...Figure 5.2-10 ENP and contributions to the ENP , for example, sensor compared...Figure 5.2-11 An equivalent circuit of a typical hydrophone and preamp syste...Figure 5.3-1 Configuration for a unidirectional hydrophone.Figure 5.3-2 Geometry for the hydrostatic hydrophone.Figure 5.3-3 Geometry for the spherical radiator.Figure 5.3-4 S OCopen circuit sensitivity per unit outside diameter.Figure 5.3-5 Stress multiplier vs. t / d for piezo‐ceramic sphere.Figure 5.3-6 S OCopen circuit sensitivity per unit outside diameter showi...Figure 5.3-7 Geometry for the radially polarized cylindrical hydrophone.Figure 5.3-8 Open circuit sensitivity per unit outside diameter ( S OC) for...Figure 5.3-9 Open circuit sensitivity per unit outside diameter ( S OC) for...Figure 5.3-10 Geometry of cylinder and endcap interface undergoing deflectio...Figure 5.3-11 Geometry of endcap deflection.Figure 5.3-12 Geometry of cylinder deflection.Figure 5.3-13 Relative radial displacement for a cylinder with an endcap.Figure 5.3-14 Relative sensitivity vs. L c/ d .Figure 5.3-15 Relative sensitivity vs. tc /d .Figure 5.3-16 Relative sensitivity vs. tec /tc .Figure 5.3-17 Geometry for the circumferentially polarized cylindrical hydro...Figure 5.3-18 Open circuit sensitivity x number of stripes ( N ), per unit out...Figure 5.3-19 Open circuit sensitivity x number of stripes ( N ), per unit out...Figure 5.3-20 Geometry for the axially polarized cylindrical hydrophone.Figure 5.3-21 Open circuit sensitivity per unit length diameter ( S OC) for...Figure 5.3-22 Open circuit sensitivity per unit length ( S OC) for axially ...

6 AppendixFigure A.1-1 Unit vectors in a Cartesian coordinate system.Figure A.1-2 A vector in a Cartesian coordinate system.

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2 Table of Contents

3 Begin Reading

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