A METHOD OF AND A DEVICE FOR ACTIVELY REDUCING THE LEVEL OF A PRIMARY FIELD OF SOUND OR VIBRATION IN A SPACE - Patent 1147512

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EP 1 147 512 A1

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(43)	Date of publication:
	24.10.2001 Bulletin 2001/43

(21)	Application number: 99963776.2

(22)	Date of filing: 29.11.1999

(51)	International Patent Classification (IPC)⁷: G10K 11/178

(86)	International application number:
	PCT/SE9902/218

(87)	International publication number:
	WO 0036/590 (22.06.2000 Gazette 2000/25)

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
	Designated Extension States:
	AL LT LV MK RO SI

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Priority:

14.12.1998 SE 9804311

(71)	Applicant: SAAB AB
	581 88 Linköping (SE)

(72)	Inventors:
	LETH, Siv S-760 41 Arholma (SE) HALVORSEN, William, G. Cincinnati, OH 45208 (US) BARNEY, Patrick Albaquerque, NM 87122 (US)

(74)	Representative: Berglund, Stefan et al
	Bjerkéns Patentbyra KBÖstermalmsgatan 58 114 50 Stockholm 114 50 Stockholm (SE)

(54)	A METHOD OF AND A DEVICE FOR ACTIVELY REDUCING THE LEVEL OF A PRIMARY FIELD OF SOUND OR VIBRATION IN A SPACE