A structure comprising: a first structural element; a second structural element; a sound-attenuating structural connector comprising: a first sheet; a second sheet opposing the first sheet, an inner surface of the second sheet spaced apart from an inner surface of the first sheet, the inner surface of the second sheet facing the inner surface of the first sheet; and a solid piece of visco-elastic sound-attenuating vibration damping material joining the first sheet and the second sheet, such that no part of the first sheet is in contact with the second sheet, the vibration damping material extending along the inner surface of the first sheet; wherein the first sheet further comprises an extended portion extending away from the vibration damping material along a plane parallel to the lateral plane of the vibration damping material; the first sheet attached to the first structural element by a fastener connected to the extended portion; and the second sheet attached to the second structural element, characterised in that a plurality of channels extends into the inner surface of each of the first sheet and second sheet, wherein the vibration damping material extends into each channel, wherein the sheets (261,262) do not form any mutually interlocking structures, and wherein opposing channels are partially aligned and are formed as dovetail channels. a first structural element; a second structural element; a sound-attenuating structural connector comprising: a first sheet; a second sheet opposing the first sheet, an inner surface of the second sheet spaced apart from an inner surface of the first sheet, the inner surface of the second sheet facing the inner surface of the first sheet; and a solid piece of visco-elastic sound-attenuating vibration damping material joining the first sheet and the second sheet, such that no part of the first sheet is in contact with the second sheet, the vibration damping material extending along the inner surface of the first sheet; a first sheet; a second sheet opposing the first sheet, an inner surface of the second sheet spaced apart from an inner surface of the first sheet, the inner surface of the second sheet facing the inner surface of the first sheet; and a solid piece of visco-elastic sound-attenuating vibration damping material joining the first sheet and the second sheet, such that no part of the first sheet is in contact with the second sheet, the vibration damping material extending along the inner surface of the first sheet; wherein the first sheet further comprises an extended portion extending away from the vibration damping material along a plane parallel to the lateral plane of the vibration damping material; the first sheet attached to the first structural element by a fastener connected to the extended portion; and the second sheet attached to the second structural element, characterised in that a plurality of channels extends into the inner surface of each of the first sheet and second sheet, wherein the vibration damping material extends into each channel, wherein the sheets (261,262) do not form any mutually interlocking structures, and wherein opposing channels are partially aligned and are formed as dovetail channels.