Information transmission by the PC so far, was intended to inform the user actively in such an event occurs as a notification sound mainly. In this study, We should incorporate the information into sound that is present at a level that does not affect the others blend into the space environment. Then, it is the study only the user who learned in advance can get the information without disturbing the atmosphere of the place and without affecting the work of others. In this study, we performed a basic experiments for realizing the system and present the design guidelines of ambient sound.