The purpose of this study is to clarify the detail in the influence of visual information in architectural spaces on the reverberance of indoor occupants. In this study, the degree of influence by differences in geometry of shoebox-shaped hall, such as height, width, and depth, on the reverberance was measured through subjective evaluation experiments using virtual environment. A real shoebox-shaped hall was adopted as model, and interior panoramic images of several spaces with different heights, widths, and depths were created using CAD. In experiments, subjects were presented with interior panoramic images as visual stimuli via head-mounted display and stereo signals of anechoic music with variable reverberation added as auditory stimuli via headphones. In experiment I, reverberation times that subjects predicted for the presented visual stimuli were measured. In experiment II, the difference in subjects' reverberance in response to auditory stimuli with and without visual stimuli were measured. These experiments calculated the degree to which visual stimuli could correct the reverberance caused by auditory stimuli that deviated from the predicted reverberation time. As a result, it became clear that changes in the depth dimension in room geometry have a greater weight on reverberance correction than other dimensions.
Terashima et al. (Wed,) studied this question.