Broadband, acoustically transparent, nonresonant PVDF hydrophone
US4789971A · kind A · utility
17Cited by
8References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1986 |
| Grant date | Dec 6, 1988 |
| Priority date | — |
| Expiry date | Apr 7, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S310/80
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An acoustically transparent voided, polyvinylidene fluoride (PVDF) hydrope 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.