indicated in the use of a tune and various musical instruments to communicate more information (see section 2.2). The use of a tune as a communication metaphor was found to be useful. Users identify pitch changes, within a tune, better when it is across octaves than within an octave.
Intensive memory and concentration demands upon subjects were also observed. There were instances (see section 2) where the auditory stimuli failed to offer the same degree of perceptual detail, as one would have expected by the visual medium. This has also been observed in other experiments ( Rigas 1996). A combination of audio and visual feedback could alleviate some of these difficulties. Following this initial investigation, larger experiments are currently being performed using visual stimuli (e.g., graphics, colours, animation) and various forms of auditory stimuli (e.g., structured musical stimuli, speech and environmental sounds) as communication metaphors either on its own or in synergy.
Brewster, S. A. ( 1994). "Providing a Structured Method for Integrating Non- Speech Audio into Human-Computer Interfaces". PhD Thesis, University of York, England, UK.
Edwards, A. D. N. (ed.) ( 1995). "Extra-Ordinary Human-Computer Interaction". Cambridge: University Press.
Rigas, D., Alty, J. L. & Long, F. W. ( 1997). "Can Music Support Interfaces to Complex Databases? In EUROMICRO-97", New Frontiers of Information Technology, pp. 78-84. IEEE Computer Society Press.
Rigas, D. & Alty J. L. ( 1997). The Use of Music in a Graphical Interface for the Visually Impaired. In Howard, S. Hammond, J. & Lindgaard K. (Eds.): Human- Computer Interaction, INTERACT'97: Proc. of the 5th IFP Conference on Human-Computer Interaction, pp. 228-235. Sydney, Australia: Chapman and Hall.
Rigas, D. & Alty, J. L. ( 1998). "Using Sound to Communicate Program Execution". In EUROMICRO-98, Engineering Systems and Software for the Next Decade, pp. 625-632, IEEE Computer Society Press.
Rigas, D. ( 1996). Guidelines for Auditory Interface Design: An empirical Investigation. PhD Thesis. Loughborough University, England, UK.
Vickers, P. & Alty, J. L. ( 1996). CAITLIN: A Musical Program Auralisation Tool to Assist Novice Programmers with Debugging. In Frysinger, S. & Kramer,, G. (eds.), Proc. of ICAD'96, pp. 17-23.