Acoustic imagination has always attracted the attention of psychologists. Charcot distinguished three types of imagination in human beings: the optic, the auditory and the motor. It is generally supposed that the acoustic and the motor types are closely related to each other. Baerwald,1 in a study of image types, mentioned acoustic imagination. Almost every textbook of psychology refers to the subject. No special attention has, however, been given to the topic of voluntarily produced auditory images and their characteristics. The studies of Jaensch and his school on eidetic images have revived interest in the world of imagination. As is well known, eidetic images possess many of the qualities of perception and take a position between representation and perception. Henning2 found that there are fixed and mobile eidetic pictures in the auditory as well as the optic sphere. He stated that "at times the acoustic image remains stable and