Abstract
This study presents four elements for composing vibration patterns, which are (a) Shortest interval, (b) Duration of vibration, (c) Intensity difference, and (d) Continuous variation in intensity. Interval and duration of the vibration offer the elements of rhythm, intensity difference, and continuous variation in intensity brings the second dimension for encoding the vibration pattern.
Based on the attributes of rhythm and intensity, sixteen initial vibration patterns are encoded by four rhythm types and four intensity difference types. Rhythms are composed by four duration of vibrations and three intervals. Intensity types are (a) Strengthening, (b) Weakening, (c) High intensity, and (d) Low intensity. The results achieve 72.27% for accuracy of overall vibration patterns. Intensity differences have correct rate at 92.19%. The results for recognition of rhythm types are recognized at 75.78%.
The result shows that people can really differentiate the different rhythm and intensity by their tactile sense, but has limitation. This research provides the guideline for vibration pattern design, and the third scenario for non-visual interaction.

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