According to an aspect, a hearing device adapted to be worn at an ear of a user for in-situ monitoring of a middle ear of the user is disclosed. The method includes presenting graphical information on the touchscreen display. The compounds and their salts can be employed as ingredients in pharmaceutical compositions, optionally in combination with other antivirals, immunomodulators, antibiotics or vaccines. The multiplexing is controlled by the first-order phase code. The control means controls the signal control signal by using the additional control signal.