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1. (WO2017191293) A SOUND DAMPING DEVICE

Pub. No.:    WO/2017/191293    International Application No.:    PCT/EP2017/060725
Publication Date: Fri Nov 10 00:59:59 CET 2017 International Filing Date: Fri May 05 01:59:59 CEST 2017
IPC: G10K 11/16
F01N 1/06
F01N 1/08
F01N 1/10
F01N 1/16
F01N 1/24
F24F 13/24
F16L 55/027
F16L 55/033
G10K 11/175
G10K 11/178
Applicants: SONTECH INTERNATIONAL AB
Inventors: CORIN, Ralf
Title: A SOUND DAMPING DEVICE
Abstract:
A sound damping device comprises a first flow channel device (4) and a second flow channel device (6) separated from one another in the elongation of said first and second flow channel devices (4, 6) by at least one intermediate wall (8; 8a, 8b, 8c, 8d, 8e) as seen in the elongation of said first and second flow channel devices (4, 6), said intermediate wall being at least partly provided with a sound attenuating means (9), wherein said first flow channel device (4) has a first inlet (5a) and a first outlet (5b) for a first flow and said second flow channel device (6) has a second inlet (7a) and a second outlet (7b) for a second flow. According to the invention, at least said second flow channel device (6) is provided with an adjustable pressure influencing means (35) for creating a predetermined dynamic pressure difference over said sound attenuating means (9) with respect to the first flow channel device (4).