u201c microsoft kinect u201d or in a smartphone it is noted that the smartphone may also comprise two cameras that might be used according to the present invention in case that the hearing device 1 is not mechanically coupled to the head of the hearing device user it is necessary to detect a head movement of the hearing device user in order to track said person being important for the hearing device user e g a speaker such an information could be derived from a further sensor in the hearing device 1 such further sensor being a camera looking at the head of the hearing device user for example a synchronization of the acoustic detection of speech pauses of the person being important for the hearing device user speaker or target person with the visual detection of the conversation activity of the target person e g by detecting whether said person is talking or is silent by analysing an image taken by the camera makes the tracking algorithm more robust and may help for a fast adaptation to conversational turns e g changing the target person by visual detecting speech pauses of the target person in continuous manner in a further embodiment of the present invention the microphone of the auxiliary device e g smartphone may be used for such a detection fig3 a and 3 b schematically show top views of the hearing device user 10 among a number of people 15 to 19 surrounding said user 10 the hearing device user 10 wears the hearing device 1 illustrated in and described in connection with fig2 in the situation depicted in fig3 a and 3 b it is assumed that the hearing device user 10 is interested in listening to what the speaker.