Cross-modal

The phenomenon whereby information or stimulation in one sensory modality (such as vision) systematically influences or corresponds with perception in another modality (such as hearing or touch). In accessibility contexts, cross-modal correspondences are exploited in sensory substitution—for example, using sound pitch to represent visual brightness (higher pitch = brighter) or vibration intensity to represent color darkness. Research has identified reliable cross-modal mappings: loud sounds correspond to large objects, high pitches to small objects, and rough textures to low-frequency sounds. Understanding these natural correspondences helps designers create intuitive mappings when translating visual information into auditory or tactile feedback for blind users.