How do visual and tactile experiences help people locate the source of a sound?

In the context of perceptual learning, the ability to locate the source of a sound is not solely an auditory process; it is significantly enhanced by the integration of visual and tactile experiences. While the brain primarily uses binaural cues—such as differences in sound intensity and arrival time between the two ears—to determine a sound's horizontal position, these cues are often insufficient on their own for a complete understanding of spatial orientation.12

Humans with full sensory endowment learn to anchor their auditory perception to visual and tactile inputs to improve accuracy. For example, a person can more precisely turn toward a distant sound source if that source is illuminated at the moment the sound occurs, demonstrating how visual cues facilitate spatial localization.3

Furthermore, the development of space perception relies on the interaction between sight and touch, particularly during early development when tactile exploration helps establish a well-articulated sense of space. Without these multisensory interactions, individuals may find it difficult to navigate or understand their environment using auditory cues alone. Ultimately, success in orientation is highest when environmental information is gathered through as many senses as possible, as the brain learns to recognize the systematic relationships between these simultaneously available stimuli.3