Directional isophasic toroidal whistle
US8925478B2 · kind B2 · utility
5Cited by
19References
12Claims
0Family size
Inventor
Key dates
| Filing date | May 1, 2012 |
| Grant date | Jan 6, 2015 |
| Priority date | — |
| Expiry date | Mar 2, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K11/28
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An acoustic projector includes a toroidal whistle having an annular mouth and a foot set in a bowl like reflector. The reflector extends radially outwardly from the foot and has a concave section circumscribing the annular mouth. A whistle bowl is configured to suppress turbulence in air flow and thereby provide laminar flow to an outlet jet orifice into the annular mouth. The concave section is shaped to reflect isophasic sound generated at the mouth in a coherent beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.