Image generation that reflects physiological and psychological state in real time

As a basic approach to realization of the real-time image generation that reflects physiological and psychological state, in this study, an auditory biofeedback system mediated by the cross-correlation coefficient 1/2 _max from blood pressure to heart rate has been developed. First, a personal computer system that can calculate 1/2 _max in real time has been developed. Next, a feedback loop has been added to the system so that the magnitude of a noisy sound presented to the subject can be changed according to 1/2 _max. The results obtained from the experiments using this system indicated that the auditory biofeedback loop mediated by 1/2 _max can be realized. However, the re-tuning of the controller in consideration of individual difference is required for establishing a sufficiently stable feedback.