Abstract: A method to adjust a hearing system comprising two hearing devices to be at least partly inserted into left and right ear of a head is disclosed, each hearing device comprising at least one microphone. By the steps of: exposing the hearing devices to a predefined sound source positioned at a predefined angle of incidence with respect to the head, determining power levels of signals recorded by the microphones as a function of angles of incidence of the sound source being positioned at different angle of incidence in order to obtain a relation between power levels and angle of incidence for said sound source, and storing said relation in a memory unit contained in at least one of the hearing devices, a head-related transfer function is automatically taken into account while the hearing system is adapted to the individual. Therewith, an optimal adaptation of the hearing system is obtained also resulting in precise sound source localization during an operating mode.