Double piston acoustic transducer with selectable directivity
US4996674A · kind A · utility
10Cited by
1References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 21, 1987 |
| Grant date | Feb 26, 1991 |
| Priority date | — |
| Expiry date | Dec 21, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB06B1/0618
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A direction selective transducer which includes a center mass fixed between two active transducer element stacks and two head masses. The center mass couples the two stacks and allows the ratio of radiation produced by each head mass to be selected as desired by varying the amplitude and phase of drive voltages applied to the stacks. The transducer can also be used as a directional receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.