Abstract
A system for the creation of computer-generated sound patterns of two-dimensional line graphs is described. The objectives of the system are to provide the blind with a means of understanding line graphs in the holistic manner used by those with sight. A continuously varying pitch is used to represent motion in the x direction. To test the feasibility of using sound to represent graphs, a prototype system was developed and human factors experimenters were performed. Fourteen subjects were used to compare the tactile-graph methods normally used by the blind to these new sound graphs. It was discovered that mathematical concepts such as symmetry, monotonicity, and the slopes of lines could be determined quickly using sound. Even better performance may be expected with additional training. The flexibility, speed, cost-effectiveness, and greater measure of independence provided the blind or sight-impaired using these methods was demonstrated.
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References
Lederman, S. J., and Campbell, J. I., Tangible graphs for the blind.Human Factors 24(1):85–100, 1982.
Telesensory Systems, Inc., 3408 Hillview Avenue, Palo Alto, Calif., 1984.
Saslow, M. G., Frequency discrimination as measured by AB and ABX procedures.J. Acoust. Soc. Am. 41:220–221, 1967.
Yeung, E. S., Pattern recognition by audio representation.Anal. Chem. 52(7):120, 1980.
Roffler, S. K.,Sound localization in the vertical plane. Doctoral dissertation, University of Chicago, 1967.
Roffler, S. K., and Butler, R. A., Factors that influence the localization of sound in the vertical plane.J. Acoust. Soc. Am. 43:1255–1259, 1968.
Roffler, S. K., and Butler, R. A. Localization of tonal stimuli in the vertical plane.J. Acoust. Soc. Am. 43:1260–1266, 1968.
Mathews, M. V.,The Technology of Computer Music, M.I.T. Press, Cambridge, Mass., 1969, p. 178.
Stevens, S. S., Volkmann, J., and Newman, E. B., A scale for the measurement of the psychological magnitude of pitch.J. Acoust. Soc. Am. 8:185–190, 1937.
Alden, A. B., and Scadden, L. A.,Annual Report of Progress, Rehabilitation Engineering Center of the Smith-Kettlewell Institute of Visual Sciences Institutes of Medical Sciences, San Francisco, Auditory Oscilloscope Modification, March 1979, pp. 9–11.
Bly, S.,Sound and computer information presentation. Doctoral dissertation, University of California, Davis, 1982.
Yonezawa, Y., and Ito, K., Application of sound localizing effect to pattern display—Examination of display panel.Electron. Commun. Japan 60-C(10):98–106, 1977.
Bateman, W.,Introduction to Computer Music, Wiley, New York, 1980, pp. 64–69.
Shepard, R. N., Circularity of judgments of relative pitch.J. Acoust. Soc. Am. 36:2346–2353, 1964.
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This work was prepared under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under contract No. W-7405-Eng-48.
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Mansur, D.L., Blattner, M.M. & Joy, K.I. Sound graphs: A numerical data analysis method for the blind. J Med Syst 9, 163–174 (1985). https://doi.org/10.1007/BF00996201
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DOI: https://doi.org/10.1007/BF00996201