A New Multilayer Planar PVDF Standard Hydrophone and its Applications
Abstract
A new type of PVDF hydrophone, the multilayer planar PVDF hydrophone, is described in this paper. 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 μ Pa per Hz bandwidth.The working freqency range og hyrophon is 20kHz ~4MHz.In the range of 100kHz ~ 1MH,the hydrophone has a flat frequency response with sensitivity -205 dB & 1.5 dB (0 dB = 1 V/pPa). 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.
Written by John on November 10th, 2008 with
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