Acoustic detection system
US4964100A · kind A · utility
8Cited by
5References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1989 |
| Grant date | Oct 16, 1990 |
| Priority date | — |
| Expiry date | Dec 1, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K11/08
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An acoustic detection device having a parabolic dish antenna for gathering ound waves and providing a first stage of amplification, an exponential horn located at the focus of the parabolic dish antenna for further acoustic amplification, a fluidic gainblock for a final stage of amplification, and acoustic earphones for listening. Either a hand operated latex bulb or a mechanical pump is used to pressurize a plastic fluid storage container that is used to supply fluid to the fluidic gainblock. Within the fluidic gainblock are four or more staged laminar proportional amplifiers having a bandwidth of 0 to 4,000 Hz.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.