| 发明名称 |
Directional isophasic toroidal whistle |
| 摘要 |
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. |
| 申请公布号 |
US8925478(B2) |
申请公布日期 |
2015.01.06 |
| 申请号 |
US201213460932 |
申请日期 |
2012.05.01 |
| 申请人 |
|
发明人 |
Graber Curtis E. |
| 分类号 |
G10K5/00;G10K11/26;G10K11/28 |
主分类号 |
G10K5/00 |
| 代理机构 |
Taylor IP, P.C. |
代理人 |
Taylor IP, P.C. |
| 主权项 |
1. An acoustic projector comprising:
a toroidal whistle having an annular mouth, a bowl and an annular orifice from the bowl for releasing an air jet into the annular mouth configured to generate an isophasic sound beam; a source of pressurized air for connection to the bowl; a source of laminar air flow into the annular orifice; and a radiating surface radially displaced from the annular mouth, the radiating surface having a concave profile configured to reflect said isophasic sound beam generated at the mouth in a coherent beam on a radiant axis. |
| 地址 |
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