Basic research for development of a communication support device using air-conducted sound localization
Last modified: 2011-09-02
Abstract
We have been engaged in the development of a new support device for subjects whose independent daily activities are limited due to severe progressive neuromuscular disease. In this study, we examined the possibility of developing a P300-type BCI (brain–computer interface) using orientation discrimination of stimulus sound with auditory lateralisation using a virtual sound source for air-conducted sound presented to the subject bitemporally. Sound stimulation with sound localization used in the study had a level difference of approximately 10 dB and time difference of approximately 0.6 ms, and was fixed at 60° to the left and to the right from the median. It was suggested that a virtual sound source with sound image fixed in left and right directions with added difference between the left and right ears can be used for development of a P300-type BCI by applying auditory stimulation. To further proceed to the development of a P300-type BCI system using auditory stimulation with comfort and convenience with the aim of reducing user burden in a clinical setting, we will reexamine the extraction algorithm for the target waveform, and examine the effects of the interval between stimulus presentation to make this a daily life supporting system to realise a faster and more efficient multiple command sending mechanism.
References
［1］M. Chishima, A. Nara, M. Hashimoto, K. Itoh. Examination of optimum stimulus conditions for development of P300-type BCI system using bone conduction stimulus sound. TOBI Workshop Ⅱ Proceeding, 31-32, 2010.
［2］G. von Békésy. The Moon Illusion and Similar Auditory Phenomena. Am J Psych, 62(4):540-552, 1949.
［3］Mills, A. W. (1972). Auditory localization. In J. V. Tobias (Ed.), "Foundations of Modern
Auditory Theory," Vol. II. New York: Academic Press. , Academic Press, New York, 1972, pp. 303–348, Chapter Auditory localization.
［4］J. Blauert . Spatial hearing with multiple sound sources and in enclosed spaces. In: Spatial hearing: the psychophysics of human sound localization (revised edition) pp. 201–287. Cambridge, MA: MIT. (1997)
［5］E. M. Wenzel . Localization in virtual acoustic displays, Presence, 1(1), 80-107, 1992.
［6］S. D. Erulkar. Comparative aspects of sound localization. Physiol Rev, 52:237–360, 1972.
［7］G. Plenge. On the difference between localization and lateralization. J Acoust Soc Am, 56:944-951, 1974.
［8］D. R. Begault, E. M. Wenzel. Headphone localization of speech. Human Factors, 35(2): 361-376, 1993.
［9］K. Saberi, L. Dostal , T. Sadralodabai, D. R. Perrott. Minimum audible angles for horizontal, vertical, and oblique orientation: Lateral and Dorsal planes. Acustica, 75: 57-61, 1991.
［10］L. Calmes, G. Lakemeyer, H. Wagner. Azimuthal sound localization using coincidence of timing across frequency on a robotic platform. J Acoust Soc Am, 121(4): 2034-2048, 2007.
［2］G. von Békésy. The Moon Illusion and Similar Auditory Phenomena. Am J Psych, 62(4):540-552, 1949.
［3］Mills, A. W. (1972). Auditory localization. In J. V. Tobias (Ed.), "Foundations of Modern
Auditory Theory," Vol. II. New York: Academic Press. , Academic Press, New York, 1972, pp. 303–348, Chapter Auditory localization.
［4］J. Blauert . Spatial hearing with multiple sound sources and in enclosed spaces. In: Spatial hearing: the psychophysics of human sound localization (revised edition) pp. 201–287. Cambridge, MA: MIT. (1997)
［5］E. M. Wenzel . Localization in virtual acoustic displays, Presence, 1(1), 80-107, 1992.
［6］S. D. Erulkar. Comparative aspects of sound localization. Physiol Rev, 52:237–360, 1972.
［7］G. Plenge. On the difference between localization and lateralization. J Acoust Soc Am, 56:944-951, 1974.
［8］D. R. Begault, E. M. Wenzel. Headphone localization of speech. Human Factors, 35(2): 361-376, 1993.
［9］K. Saberi, L. Dostal , T. Sadralodabai, D. R. Perrott. Minimum audible angles for horizontal, vertical, and oblique orientation: Lateral and Dorsal planes. Acustica, 75: 57-61, 1991.
［10］L. Calmes, G. Lakemeyer, H. Wagner. Azimuthal sound localization using coincidence of timing across frequency on a robotic platform. J Acoust Soc Am, 121(4): 2034-2048, 2007.