For a microphone having an increased rear volume, a cavity housing is proposed, comprising at least a base plate and a covering, which define and enclose the cavity. On the base plate, a microphone transducer, usually an MEMS component, is mounted alongside a sound guiding element. The microphone transducer and the sound guiding element are sealed off with respect to the base plate by a partition and separate the front volume from a rear volume under the covering. The sound guiding element provides a sound channel, which connects an opening in the covering to the front volume. The sound guiding element finishes right up against the covering and thus seals off the sound channel with respect to the rear volume.