The invention relates to an audio
assembly for a hearing device, the audio
assembly comprising: 1) a
nozzle comprising a sound channel and a sound outlet acoustically connected to the sound channel, the sound channel having a cross-sectional area AN delimited by a channel wall in a plane substantially perpendicular to a longitudinal axis of the sound channel, and 2) a micro-
receiver comprising a sound outlet acoustically connected to the sound channel, the micro-
receiver is at least partially positioned in the sound channel, where the micro-
receiver has a cross-sectional area AR defined by a housing of the micro-receiver in a plane substantially perpendicular to a longitudinal axis of the micro-receiver, and where the housing of the micro-receiver comprises a sound output port and a vent opening, wherein longitudinal axes of the sound channel and the micro-receiver are substantially parallel when the micro-receiver is at least partially positioned in the sound channel, and wherein a cross-sectional area AN of the sound channel exceeds a cross-sectional area AR of the micro-receiver, and wherein an excessive cross-sectional area of the sound channel forms an acoustic channel between a portion of the sound channel wall and an outer housing portion of the microreceiver, the acoustic channel defining an acoustic
mass, and wherein the acoustic channel extends in a direction of a longitudinal axis of the sound channel, and wherein the acoustic channel is acoustically connected to the sound outlet of the
nozzle and the sound output port of the microreceiver, whereby the acoustic channel is arranged between the sound outlet of the
nozzle and the sound output port of the microreceiver.