Broadband, Acoustically Transparent, Nonresonant PVDF (Polyvinylidene Fluoride) Hydrophone.
Patent, Filed 7 Apr 86, patented 6 Dec 88,
DEPARTMENT OF THE NAVY WASHINGTON DC
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An acoustically transparent voided, polyvinylidene fluoride PVDF hydrophone made of material whose impedance matches the characteristic acoustic impedance rho c of sea water, having drastically reduced diffraction and resonance effects. The frequency response is thus flat at frequencies less than one-half elastic wavelength in the PVDF material. An array of such hydrophones in front of a projector saves space without affecting projector performance. Patent. fr
- Acoustic Detection and Detectors