(19)
(11) EP 1 866 908 A2

(12)

(88) Date of publication A3:
19.07.2007

(43) Date of publication:
19.12.2007 Bulletin 2007/51

(21) Application number: 06724041.6

(22) Date of filing: 05.04.2006
(51) International Patent Classification (IPC): 
G10K 11/178(2006.01)
(86) International application number:
PCT/EP2006/003092
(87) International publication number:
WO 2006/105948 (12.10.2006 Gazette 2006/41)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK YU

(30) Priority: 07.04.2005 DE 102005016021
07.04.2005 US 669061 P

(71) Applicant: Airbus Deutschland GmbH
21129 Hamburg (DE)

(72) Inventors:
  • BREITBACH, Harald
    37085 Göttingen (DE)
  • GERNER, Christian
    26452 Sande (DE)
  • SACHAU, Delf
    22047 Hamburg (DE)
  • SOMMER, Jochen
    22083 Hamburg (DE)

(74) Representative: Kopf, Korbinian Paul 
Maiwald Patentanwalts GmbH Elisenhof Elisenstrasse 3
80335 München
80335 München (DE)

   


(54) ACTIVE COUNTERSOUND SYSTEM WITH SPECIAL ARRANGEMENT OF THE SECONDARY ACTUATORS FOR REDUCING THE PASSAGE OF SOUND AT AN OPEN BOUNDARY AREA OF TWO VOLUMES