Invention Application
WO1997035300A1 METHOD AND APPARATUS FOR THE ACTIVE CONTROL OF SOUND RADIATED FROM FLOW DUCTS
审中-公开
用于流动导管辐射的主动控制的方法和装置
- Patent Title: METHOD AND APPARATUS FOR THE ACTIVE CONTROL OF SOUND RADIATED FROM FLOW DUCTS
- Patent Title (中): 用于流动导管辐射的主动控制的方法和装置
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Application No.: PCT/GB1997000624Application Date: 1997-03-10
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Publication No.: WO1997035300A1Publication Date: 1997-09-25
- Inventor: THE SECRETARY OF STATE FOR DEFENCE IN HER BRITANNIC MAJESTY'S GOVERNMENT OF THE UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND
- Applicant: THE SECRETARY OF STATE FOR DEFENCE IN HER BRITANNIC MAJESTY'S GOVERNMENT OF THE UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND , JOSEPH, Philip , NELSON, Philip, Arthur , FISHER, Michael, John
- Assignee: THE SECRETARY OF STATE FOR DEFENCE IN HER BRITANNIC MAJESTY'S GOVERNMENT OF THE UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND,JOSEPH, Philip,NELSON, Philip, Arthur,FISHER, Michael, John
- Current Assignee: THE SECRETARY OF STATE FOR DEFENCE IN HER BRITANNIC MAJESTY'S GOVERNMENT OF THE UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND,JOSEPH, Philip,NELSON, Philip, Arthur,FISHER, Michael, John
- Priority: GB9605739.3 19960319; GB9618864.4 19960910
- Main IPC: G10K11/178
- IPC: G10K11/178
Abstract:
A method for the active control of sound radiated in a duct (1) comprising sensing sound from an array (4) of sensors located on the inside surface of a flow duct and controlling an array (3) of secondary sources (loudspeakers) so as to minimize sound radiated in the far field. This is done by controlling the sound sources so as to minimize a cost function. Depending on whether total sound power or sound power towards the sideline is to be reduced, different cost functions are used by the method.
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