Abstract: A sound-absorbing panel comprising a padding layer comprising heat-bonded synthetic fibers is described. The sound-absorbing panel has a first outer face and a second outer face which are spaced from each other so as to form a panel thickness between them. The sound-absorbing panel also comprises a channel within the panel thickness. The padding material between at least one of the outer faces of the panel and the channel has a density greater than the density of the padding material far from the channel so that the panel is more rigid in the region of said channel.

Abstract: A sound-absorbing element and a sound-absorbing system comprising a fibrous material having the following properties is described: specific airflow resistance comprised between 527 and 1552 [Pa s/m]; and mass porosity comprised between 66% and 79%.

Abstract: A sound-absorbing panel comprising a padding layer with heat-bonded synthetic fibers, wherein the padding layer has a first outer surface, a second outer surface and a first thickness, wherein the panel is made of said padding layer with no further layers of a different material between the first outer surface and the second outer surface, wherein the padding layer in at least one portion of panel has a variable density in a direction transverse to the first and second outer surfaces, the density being higher in proximity of the first and second outer layers thereof and being lower in proximity of its inner layer.

Abstract: A system for arranging a plurality of sound-absorbing panels or the like is described. The system includes a first and a second guide and a first and a second panel, and each of said guides further includes a longitudinal axis, and a first longitudinal groove and a second longitudinal groove substantially parallel to said longitudinal axis, such that the first panel is retained in the first groove of the first and second guides and the second panel is retained in the second groove of the first and second guides and further such that at least one of the panels is displaceable in a guided manner inside the respective longitudinal groove.

Abstract: A directable sound-absorbing panel comprising a sound-absorbing panel, a fixing member which can be fixed to said sound-absorbing panel, an arm and an articulated joint between said fixing member and said arm, is described. An assembly of directable sound-absorbing panels is also described, said assembly comprising a plurality of sound-absorbing panels, a corresponding plurality of fixing members, a corresponding plurality of arms, a corresponding plurality of articulated joints between each arm and each fixing member, and a fixing bar to which at least a part of said plurality of arms is fixed.