A system, for profiling of brainstem functioning of a subject, configured to detect the subject's response to sounds, comprising an apparatus for stimuli generation, configured to generate sound stimuli, a communication element, communicating sound stimuli mentioned above via a sound generating device to the subject, an apparatus for analysis and storage of the subject's electrophysiological brain activity through elements attached to the subject, character ized in that said sound stimuli having varied physical properties in frequency, time and amplitude, and said apparatus for stimuli generation is communicatively connected to a triggering device, and said apparatus for stimuli generation is configured to transmit a triggering signal, via said triggering device to said apparatus for analysis and storage, of the electrophysiological brain activity, simultaneously as said sound stimuli is transmitted to the subject from the apparatus for stimuli generation; and the system is configured for brain stem audiometry, and configured to measure an auditory brainstem response upon said trig-signal for measuring brainstem activity within a time span of 0 to approximately 10 ms after beginning of said sound stimuli; wherein the system is configured to conduct a test battery, said test battery comprising nine tests presented to said subject, wherein each mentioned test consists of presentation of stimuli to the subject and registration of the electrophysiological responses to mentioned stimuli, wherein the system furthermore is configured so that mentioned sound stimuli are presented in repeated sequences; wherein said test battery comprising nine subtests: "Forward masking" - the reduced ability to perceive one sound in the presence of another temporally preceding sound; followed by "Backward masking" - the reduced ability to perceive one sound in the presence of another temporally following sound; followed by "Binaural forward masking" - the reduced ability to perceive a sound in one ear in the presence of another temporally preceding sound presented in the other ear; followed by "Directional hearing" - square-shaped sound pulses (sssp) presented in separate steps from left to right in equidistant angle-steps; followed by "Perception of distance in sounds" - sounds in which the pulse trains have been modified by means of artificial treatment in order to make the sounds sound like they are being emitted distantly; followed by "Pulse train 1" - in which a number of subtests with pulse trains with specific inter stimulus intervals (tisi) between its square-shaped sound pulses (sssp), followed by "Pulse train 2" - in which a number of subtests comprised of pulse trains with different amplitudes in its square-shaped sound pulses (sssp), followed by "Pulse train 3" - which is comprised by a number of subtests differing in that its pulse trains have square-shaped sound pulses (sssp) with different frequencies, followed by "Pulse train 4" - in which a number of subtests with pulse trains with different durations for its square-shaped sound pulses (sssp). "Forward masking" - the reduced ability to perceive one sound in the presence of another temporally preceding sound; followed by "Backward masking" - the reduced ability to perceive one sound in the presence of another temporally following sound; followed by "Binaural forward masking" - the reduced ability to perceive a sound in one ear in the presence of another temporally preceding sound presented in the other ear; followed by "Directional hearing" - square-shaped sound pulses (sssp) presented in separate steps from left to right in equidistant angle-steps; followed by "Perception of distance in sounds" - sounds in which the pulse trains have been modified by means of artificial treatment in order to make the sounds sound like they are being emitted distantly; followed by "Pulse train 1" - in which a number of subtests with pulse trains with specific inter stimulus intervals (tisi) between its square-shaped sound pulses (sssp), followed by "Pulse train 2" - in which a number of subtests comprised of pulse trains with different amplitudes in its square-shaped sound pulses (sssp), followed by "Pulse train 3" - which is comprised by a number of subtests differing in that its pulse trains have square-shaped sound pulses (sssp) with different frequencies, followed by "Pulse train 4" - in which a number of subtests with pulse trains with different durations for its square-shaped sound pulses (sssp).