METHOD AND APPARATUS FOR THE ACTIVE CONTROL OF SOUND RADIATED FROM FLOW DUCTS - Patent 0888607

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EP 0 888 607 A1

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(43)	Date of publication:
	07.01.1999 Bulletin 1999/01

(21)	Application number: 97906266.0

(22)	Date of filing: 10.03.1997

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International Patent Classification (IPC):

G10K 11/ 178^{( . )}

(86)	International application number:
	PCT/GB1997/000624

(87)	International publication number:
	WO 1997/035300 (25.09.1997 Gazette 1997/41)

(84)	Designated Contracting States:
	DE ES FR GB SE

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Priority:

19.03.1996 GB 19960005739
10.09.1996 GB 19960018864

(71)	Applicant: THE SECRETARY OF STATE FOR DEFENCE IN HER BRITANNIC MAJESTY'S GOVERNMENT OF THE UNITED KINGDOM OF GREAT BRITAIN
	London SW1A 2HB (GB)

(72)	Inventors:
	JOSEPH, Philip University of Southampton Southampton SO17 9BJ (GB) NELSON, Philip, Arthur University of Southampton Southampton SO17 9BJ (GB) FISHER, Michael, John University of Southampton Southampton SO17 9BY (GB)

(74)	Representative: Bowdery, Anthony Oliver, et al
	D/IPR (DERA) Formalities, Poplar 2, MoD (PE) Abbey Wood#19, P.O. Box 702 Bristol BS12 7DU Bristol BS12 7DU (GB)

(54)	METHOD AND APPARATUS FOR THE ACTIVE CONTROL OF SOUND RADIATED FROM FLOW DUCTS