Process unit, and computer program for imaging a moving direction by sounds

problem a method, a unit and a computer program for imaging a moving direction using tones for the visually impaired with which multi-dimensional movement direction, in particular two-dimensionally, can be expressed using sound information and people with impaired vision, and the like are provided to assist in navigation tasks , Means for Solving A moving direction of a person wearing a unit for outputting sounds is mapped using a plurality of combined tones that are output from the unit. A variety of different sound information pieces are stored in association with three or more predetermined directions, a current position of the moving target is identified and then a direction of movement of the unit is defined. A value obtained by combining two tones in a ratio corresponding to the specified moving direction sound is output on the basis of sound information elements, each two adjacent, the direction of movement on both sides surrounding directions from the predetermined directions are assigned.