The invention relates to a labelling apparatus comprising a blow device which allows compressed-air controlled delivery of a label to an object to be labelled, wherein the blow device comprises a compressed-air providing device, a plurality of nozzles for applying compressed air to the label, a distribution space which is operatively connected for fluid communication with the compressed-air providing device and the nozzles, and at least one deflector which is arranged in the distribution space, wherein the distribution space has arranged therein a porous device which surrounds the at least one deflector.