Title :
A new multilayer planar PVDF standard hydrophone and its applications
Author :
Yiquan, Yuan ; Binwen, Shi ; Zongjie, Liu
Author_Institution :
Dept. of Radio Eng., Southeast Univ., Nanjing, China
Abstract :
A new type of PVDF hydrophone, the multilayer planar PVDF hydrophone, is described. The hydrophone disturbs measured acoustic fields very little and has a high sensitivity. The noise-equivalent pressure of the hydrophone is 45 dB re 1 /spl mu/ Pa per Hz bandwidth. The working frequency range of the hydrophone is 20 kHz/spl sim/4 MHz. In the range 100 kHz/spl sim/1 MHz, the hydrophone has a flat frequency response with sensitivity -205 dB /spl plusmn/1.5 dB (0 dB=1 V//spl mu/Pa). In this range, the hydrophone has been used for five years as a standard one. Two other applications (measurements of noise spectra and ultrasonic imaging) are also reported.<>
Keywords :
acoustic noise measurement; hydrophones; piezoelectric transducers; polymer films; ultrasonic imaging; ultrasonic transducers; 20 kHz to 4 MHz; acoustic fields; flat frequency response; high sensitivity; multilayer planar PVDF standard hydrophone; noise spectra; noise-equivalent pressure; piezoelectric polymer; polyvinylidene; ultrasonic imaging; working frequency range; Acoustic noise; Chemistry; Electrodes; Impedance; Integrated circuit noise; Nonhomogeneous media; Performance analysis; Piezoelectric films; Sonar equipment; Steel;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
