Ashmead, D. H., & Wall, R. S. (1999). Auditory perception of walls via sprectral variations in the ambient sound field. Journal of Rehabilitation Research and Development, 36(4), 313-322.
Blumsack, J. (2003). Audiological assessment, rehabilitation, and spatial hearing considerations associated with visual impairment in adults: An overview. American Journal of Audiology, 12, 76-83
Burton, G. (2000). The role of the sound of tapping for nonvisual judgment of gap crossability. Journal of Experimental Psychology: Human Perception and Performance, 26, 900-916.
Carlson-Smith, C., & Wiener, W. R. (1996). The auditory skills necessary for echolocation: A new explanation. Journal of Vision Impairment and Blindness, 90(1), 21-35.
Kish, D. (1995). Echolocation: How humans can “see” without sight. Retrieved July 30, 2007 from http://www.worldaccessfortheblind.org/echolocationreview.rtf
Kish, D., & Bleier, H. (n.d). Echolocation: What it is, and how it can be taught and learned. Retrieved August 12, 2007 from http://www.worldaccessfortheblind.org/docs/echolocationtrainingguide.pdf
Schenkman, B. N., & Jansson, G. (1986). The detection and localisation of objects by the blind with the aid of long-cane tapping sounds. Human Factors, 28, 607-618.