The invention relates to a device for determining acoustically evoked brain potentials in objective audiometry from electrodes applied to the head of a subject, where the device comprises a plurality of electrodes, i. If there is no move instruction from the player through a touch panel, the game image displayed on the display screen is scrolled if the position indicated by an input position from the touch panel is included within a first peripheral area along the periphery of the display screen. The main machine comprises a handle at the lower portion and an accommodating part at the upper portion, with a stator and a rotor of a DC electric motor being provided inside the accommodating part and a wall of the accommodating part being the stator housing of the DC electric motor. Here, when the computing unit obtains the input of a priority parameter, it changes the designable range of the plurality of photographing parameters other than the priority parameter based on the priority parameter and causes the display unit to display the designable range after the change.