A sound attenuator, comprising: - a sound attenuating element (120, 130), which is formed at least in part by an assembly of a plurality of components (123, 124, 133), which: ∘ are successively connected to each other along a first axis and which ∘ each exhibit an elongated shape such that the dimension of elongation extends perpendicularly to the first axis, wherein every second component (123, 124, 133) in the assembly extends in a non-straight angle, e.g. a right angle, in respect to the successive component (123, 124, 133), and - an enclosure comprising: ∘ a first set of two mutually opposing spiral guides each configured to receive a respective opposing end of an elongated component (123, 124, 133) to extend between the guides and ∘ a second set of such mutually opposing spiral guides each configured to receive a respective opposing end of an elongated component (123, 124, 133) to extend between the guides, wherein: - the two sets of opposing guides (114A, 114B) are angularly offset from each other so as to receive the cross-wise assembly of the plurality of components (123, 124, 133) and wherein - the sound attenuating element (120, 130) is installed into the enclosure wherein the components (123, 124, 133) of the assembly are bent by the spiral guides (114A, 114B) during passage of the components (123, 124, 133) along the guides (114A, 114B) to exhibit a curved shape and form at least one non-planar ruled surface (121, 131). - a sound attenuating element (120, 130), which is formed at least in part by an assembly of a plurality of components (123, 124, 133), which: ∘ are successively connected to each other along a first axis and which ∘ each exhibit an elongated shape such that the dimension of elongation extends perpendicularly to the first axis, wherein every second component (123, 124, 133) in the assembly extends in a non-straight angle, e.g. a right angle, in respect to the successive component (123, 124, 133), and ∘ are successively connected to each other along a first axis and which ∘ each exhibit an elongated shape such that the dimension of elongation extends perpendicularly to the first axis, wherein every second component (123, 124, 133) in the assembly extends in a non-straight angle, e.g. a right angle, in respect to the successive component (123, 124, 133), and - an enclosure comprising: ∘ a first set of two mutually opposing spiral guides each configured to receive a respective opposing end of an elongated component (123, 124, 133) to extend between the guides and ∘ a second set of such mutually opposing spiral guides each configured to receive a respective opposing end of an elongated component (123, 124, 133) to extend between the guides, ∘ a first set of two mutually opposing spiral guides each configured to receive a respective opposing end of an elongated component (123, 124, 133) to extend between the guides and ∘ a second set of such mutually opposing spiral guides each configured to receive a respective opposing end of an elongated component (123, 124, 133) to extend between the guides, - the two sets of opposing guides (114A, 114B) are angularly offset from each other so as to receive the cross-wise assembly of the plurality of components (123, 124, 133) and wherein - the sound attenuating element (120, 130) is installed into the enclosure wherein the components (123, 124, 133) of the assembly are bent by the spiral guides (114A, 114B) during passage of the components (123, 124, 133) along the guides (114A, 114B) to exhibit a curved shape and form at least one non-planar ruled surface (121, 131).