A concentric multichannel loudspeaker system is located in the center of the room. Algorithmically generated sounds are projected into the room, to investigate the reflection behavior. The alternation between pulsating sounds, which provide a high degree of directional information, and standing sinusoidal sounds, which are difficult to localize, opens up a dissociative and subjective spatial experience, based on the „Franssen effect“, which stimulates the auditory process of the viewer understood as material. An acoustic impression of the room can be experienced and opens up questions about objective physical stimuli and the individual, psychological and physical perception thereof.