ABSTRACT
This chapter examines a related methodology to examine whether listeners can determine the shape of sound obstructing surfaces. While there is evidence that listeners can hear the shape of sound-emitting and sound-reflecting surfaces, it is not known whether the shape of sound-obstructing surfaces can be heard. In two experiments, blindfolded listeners were asked to identify three shapes of equal surface area, which obstructed a set of loudspeakers emitting broad-band noise. The first experiment utilized a single intensity broad-band noise, while the second experiment tested two intensities of noise. Subjects had full view of the shapes and apparatus while being given instructions. They were told that they would be blindfolded and for each trial, would be asked to judge which of the three shapes was positioned in front of the loudspeakers. Based on post-experiment interviews, subjects reported similar strategies for shape determination. Most reported that head movement aided in their determinations, and that they could hear the edges of the shapes.
