absorbing acoustic panel
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The invention relates to a cell (22, 48) for acoustically absorbent acoustic panel comprising a layer (32) porous matrix incorporating a plurality of acoustic resonators (A1-A4, B1-B6) between a first (30, 54) face and a second (28, 56) face of the porous matrix (32). According to the invention the resonators (A1-A4, B1-B6) are arranged so as to form at least two rows (24, 26, 50, 52) substantially parallel each comprising at least two resonators and extending along the first and second faces.
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[2] W Lauriks,et al. Absorption of a rigid frame porous layer with periodic circular inclusions backed by a periodic grating. , 2011, The Journal of the Acoustical Society of America.