Vibro-Audio

Vibro-audio is a multimodal interaction technique that combines vibration feedback from a device's built-in motor with auditory cues to convey information non-visually. On touchscreen devices, vibro-audio enables users to explore graphical content through touch — the device vibrates when a finger contacts meaningful elements like data points or lines, and spoken labels or tones provide additional context. Unlike traditional tactile graphics that require specialized hardware, vibro-audio leverages the vibration motors and speakers already embedded in smartphones and tablets, making it a low-cost, portable approach to accessible data visualization. Research has shown vibro-audio exploration to be functionally equivalent to natural language descriptions for learning graphical STEM content.