From Silent Signals to Synthetic Sight: Bioelectronic Pathways Toward Human Echolocation and Sensory Substitution

Loss of vision profoundly alters perceptual access to the environment, yet neuroscience demonstrates that the human brain retains remarkable capacity for cross-modal plasticity. Technologies developed for silent speech reconstruction and bioelectronic signal decoding—such as surface electromyography (sEMG), vibration sensing, and real-time AI signal processing—offer conceptual tools that may extend beyond communication restoration into sensory substitution. This paper explores whether similar bioelectronic frameworks can support non-visual spatial perception in individuals who have lost vision, drawing analogies to biological echolocation in bats while remaining strictly within human physiological constraints. The analysis evaluates acoustic echolocation training, wearable sonar systems, vibrotactile feedback arrays, and AI-mediated environmental encoding. It concludes that while humans cannot biologically replicate bat-level echolocation, technological augmentation can create structured acoustic or tactile spatial mapping systems that partially compensate for visual loss. The promise lies not in restoring sight, but in enhancing navigational autonomy through multimodal neuroadaptive interfaces.