Abstract
This research has developed the User Interface, called Vibration Alert Interface (VAI), which presents information by the difference in the frequencies of vibration. Much of conventional vibration presentation equipment warned the user by on and off change of vibration, however, VAI is to change a frequency of shown vibration, and its degree as well as warning of just danger can be even shown. But actually, it's studied that the vibration sensing ability isn't fixed because of disturbance, for example, the user's state. To reduce these influence, a system with reproducibility is requested, therefore it has been studied variously so far. Accordingly, this paper contrived the method to suppress dispersion of vibration sensation from the different angle, presentation method of vibration. It's stated that the experiment, which investigates reproducibility of vibration sensation, was made using the Relative Vibration Sense Presentation Method, and that this presentation method improved repeatability.
