A device for a sound-absorbing unit for reduction of sounds from a flowing gas stream, including a first flow path and a second flow path for said gas stream and a switch-over device for alternating guiding of the gas stream along the first flow path and the second flow path, respectively. The first component is attached to the wall and closes a hole through the wall on a first side thereof. The aluminum oxynitride includes a mixture of phases having a hexagonal aluminum nitride type structure, a cubic aluminum nitride type structure, and optionally amorphous structure. The generic labels may be translated to pipeline-specific labels, which may be usable to automatically adjust an image. One or more attributes specifying a type of metadata storable in identity are defined with each such variable. A co-implant region is formed in the active silicon.