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Galvanic vestibular stimulation (GVS) induces a sensation of virtual acceleration as vestibular information. GVS is expected as a wearable interface because it does not need a large device like a motion platform. In particular, GVS with alternating current (AC) can influence vision which mainly consists of torsional component. The purpose of this r...
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Citations
We have developed a novel sensation interface using galvanic vestibular stimulation (GVS). The vestibular system is stimulated by weak current through the electrodes, placed behind the ears. GVS causes lateral virtual acceleration toward the anode, which shifts the sense of balance. The GVS interface can induce lateral walking diverging from intended straight line. Based on this GVS interface technology, we produced an artwork on the subject of wavering identity in the modern society. In our artwork, the compact display is floating on the water. An acceleration sensor is integrated into the display, and the obtained data is sent to the GVS interface. GVS is presented according to the data form the sensor. Any kind of vibration of the display disturbs the balance of the wearers. When the display falls over, they feel big swaying sensation. This GVS interaction makes them feel truly connected to the display. They keep on walking, while holding the tank of water. This artwork is intended to observe and hold your wavering identity (the display on the water) from the outer perspective.
Superhuman sports is an emerging research field focused on exploring human augmentation in a playful way. The field combines competition and physical elements from sports with technology to overcome the somatic and spatial limitations of human bodies. It serves as a fascinating application area for human augmentation.
Galvanic vestibular stimulation induces virtual acceleration sensation and is expected to be applied in computer games to improve their reality. The acceleration sensation can be enhanced by giving countercurrent which consists of an opposite current part and a forwarding current part. Conventionally, however, the degree of the enhancement is uncontrollable. This study reports that the effect of countercurrent can be modeled by an electrical circuit containing a capacitor and resistors. To model the effect of the countercurrent on the acceleration perception, we investigated the relation between the parameters: the duration and the strength of the opposite current part, of the countercurrent and strength of acceleration perception. The results of our study show that the strength of the acceleration sensation induced by the countercurrent stimulation has a nonlinear correlation with the duration of the opposite current, and the characteristics of the enhancement effect can be estimated using a CR circuit model.
