| 摘要 |
An acoustic element comprising a platelike active element (1). The platelike active element (1) comprises creases (6). The creases (6) can be produced su ch that the platelike active element (1) forms a space (7) comprising at least one opening (9) and/or gap (8), whereby the space (7) and the opening (9) and/or the gap (8) constitute a Helmholtz resonator.
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