ABSTRACT
The theory of phenomenal geometry describes the notion that spatial experiences are dependent on three primary perceptual variables: perceived direction, perceived distance, and perceived self-motion. From knowledge of these primary variables, one may predict (by application of the laws of geometry) such derived variables as apparent target displacement or motion. Conversely, measures of appropriate “derived” variables can be used to estimate the magnitude of an underlying primary variable. Although origi nally developed by Gogel (1990) within the context of his research on visual space perception, the theory is not intrinsically limited to visual experiences. Discrete auditory targets may also be described in terms of their apparent directions and distances. The perception of one’s own movement (or lack of movement) is, of course, independent of target modality. This chapter provides a discussion of the application of the concepts of phenomenal geometry to auditory spatial experiences, with a specific concern for the possible usefulness of the theory in constructing techniques for the "indi rect” (nonverbal) measurement of perceived auditory distance. Some initial studies, involving a variety of different distance cues, are discussed.
