1. An image and audio reproduction device comprising: a memory configured to store an image captured by an image capturing device and a plurality of acoustic signals whose arrival directions are respectively a plurality of locations, at which a sound is picked up by a sound pickup device, in an image capturing scope of the image capturing device; and a processor configured to set, as one group, arrival directions of acoustic signals with a high degree of similarity of amounts of characteristics on the basis of a degree of similarity of the amounts of characteristics between acoustic signals that are from the arrival directions adjacent to each other, and to add information to the image so as to reproduce the image, the information representing a position of the group in an image capturing scope of the image capturing device.