Element for sound absorption
    7.
    发明授权

    公开(公告)号:EP2949903B1

    公开(公告)日:2018-11-14

    申请号:EP15154124.0

    申请日:2012-12-03

    CPC classification number: F02C7/045 F02K1/827 F05B2260/962 Y02T50/672

    Abstract: The element (26; 126) comprises a front layer (28), which is, at least in a region thereof, sound-permeable; a back layer (30), which is substantially sound-reflecting; and a honeycomb layer (32), which is sandwiched between the front layer (28) and the back layer (30), and defines a mesh structure having a plurality of hollow cells (34) bordering on one another. The cells (34) are provided to resonate within their side walls the sound waves entering through the front layer (28) and being diverted by the back layer (30). The element (26;126) further comprises a plasma actuator (38, 40, 42, 44; 38, 40, 142, 44) provided to generate in the cells (34) a plasma discharge (D) inducing a flow of ionized air particles (A) interacting with the sound waves coming from the front layer (28).

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