EP 0050621 A1 19820505 - NOISE REDUCTION SYSTEM.
Title (en)
NOISE REDUCTION SYSTEM.
Title (de)
LÄRMDÄMPFSYSTEM.
Title (fr)
SYSTEME DE REDUCTION DU BRUIT.
Publication
Application
Priority
US 8000466 W 19800428
Abstract (en)
[origin: EP0039459A1] A method and apparatus for reducing unwanted pressure impulses in fluid moving devices comprising at least one resonator means (30) for selectively reducing part of the device's blade passing tone, said resonator means being positioned at the point of smallest separation between the casing (12) and the impeller (14).
Abstract (fr)
Procede et appareil de reduction d'impulsions de pression indesiree dans des dispositifs deplacant des fluides comprenant au moins un resonateur (30) pour reduire selectivement une partie de l'intensite acoustique passant par la pale du dispositif, ce resonateur etant place au point de la plus petite separation entre l'enveloppe (12) et l'impulseur (14).
IPC 1-7
IPC 8 full level
F04D 29/66 (2006.01); G10K 11/172 (2006.01)
CPC (source: EP)
F04D 29/665 (2013.01); G10K 11/172 (2013.01)
Designated contracting state (EPC)
FR
DOCDB simple family (publication)
EP 0039459 A1 19811111; EP 0039459 B1 19831005; DE 3161106 D1 19831110; EP 0050621 A1 19820505; WO 8103201 A1 19811112
DOCDB simple family (application)
EP 81103122 A 19810425; DE 3161106 T 19810425; EP 81900348 A 19800428; US 8000466 W 19800428