Glossary

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Variable Friction(also: Variable Friction Display, Friction Modulation)

A surface haptics technique that dynamically adjusts the friction between a user's fingertip and a touchscreen surface to create the sensation of different textures. Typically achieved through ultrasonic vibration that creates a thin cushion of air beneath the fingertip,…

Vibro-Audio(also: Vibrotactile Audio, Vibro-Tactile)

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…

Vibro-Audio Map(also: VAM, Vibro-Audio Display)

A multimodal map representation for touchscreen devices that combines vibrotactile feedback with synchronised audio cues to convey spatial information non-visually. Users explore the map by dragging a finger across the screen; when they cross a feature (a street, a room…

Vibromotor(also: Vibration Motor, Vibrotactile Actuator, ERM)

A vibromotor is a small motor that produces vibration, commonly used in haptic feedback devices, smartphones, and wearable technology. The most common types are eccentric rotating mass (ERM) motors, which spin an off-center weight, and linear resonant actuators (LRAs), which…

Vibrotactile(also: Vibrotactile Feedback, Vibrotactile Stimulation)

A form of tactile feedback that uses mechanical vibrations applied to the skin to convey information. Vibrotactile stimulation typically operates at frequencies between 10-500 Hz and is perceived through mechanoreceptors in the skin. In assistive technology, vibrotactile…

Vibrotactile Feedback(also: Vibrotactile, Vibrotactile Display, Tactile Vibration)

A form of haptic feedback that uses vibration patterns to convey information through the sense of touch. In accessibility, vibrotactile feedback provides an alternative or complement to visual and auditory output channels, enabling communication with users who are blind, deaf,…

Virtual Texture(also: Simulated Texture, Haptic Texture)

A virtual texture is a computer-generated tactile surface property rendered through a haptic device, simulating the feel of roughness, smoothness, or other surface characteristics without a physical material being present. Virtual textures are created by varying the resistance,…

Virtual Wall(also: Haptic Wall, Haptic Boundary)

A simulated physical boundary in a haptic interface that the user can feel through a force-feedback device, modelled as a massless plate backed by a spring with stiffness and a damper with viscosity. Virtual walls are used to represent the edges and boundaries of graphical user…

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