A hearing device, in particular of a hearing aid, in addition to a first sound output device for acoustic supply to the ear of the user, has a second sound output device for output of a test sound in a room in which the hearing device is located. The hearing device has an acquisition device for acquisition of a response to the test sound from the room. Room acoustic information that can be used to control the signal processing of the hearing device is acquired from the response. The signal processing in the hearing device can be automatically adapted to the current room acoustic.