Two Clicks Enough for Expert Echolocators to Sense Objects
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Expert echolocators can discern the location of objects with remarkable efficiency; a new study reveals that as few as two clicks and their corresponding echoes are sufficient for these individuals to build a spatial understanding of their surroundings. Researchers at the Smith-Kettlewell Eye Research Institute in San Francisco investigated how the brain processes sound during human echolocation, attaching electrode caps to both blind experts and sighted novices to monitor brain activity as they listened to click-echo pairs. The findings, published April 6 in eNeuro, demonstrate that each click-echo pairing incrementally adds to the evidence the brain uses to make perceptual decisions, rather than relying on a single, comprehensive auditory perception. “What remained unexamined here was how this happens, how the information builds in real time, over individual echo signals,” says cognitive neuroscientist Santani Teng, explaining the study’s focus on the step-by-step process of echolocation. Tongue Clicks and Echoes Build Spatial Awareness Participants were tasked with identifying whether an object was positioned to their right or left, and the results confirmed previous findings that expert echolocators significantly outperform sighted individuals in this task; one participant accurately determined an object’s direction after hearing only two click-echo sets. Crucially, the brain wave data revealed that each individual click-echo pairing contributed to the accumulating evidence used for perceptual decision-making, a finding that differs from the idea of a single, comprehensive auditory “snapshot.” According to neuroscientist Monica Gori at the Italian Institute of Technology in Genoa, “The study suggests that in human echolocation, spatial representations are constructed by progressively accumulating acoustic evidence over time, rather than through a single ‘optimal snapshot.’” Researchers are now focused on identifying the specific factors that contribute to echolocation proficiency, including the ability to filter out the initial click and focus solely on the returning echo. Haydée García-Lázaro, a cognitive neuroscientist at the Smith-Kettlewell Eye Research Institute, notes the skill is truly remarkable, with real-life benefits, but it is not magic, emphasizing the neurological processes underpinning this extraordinary sensory adaptation.
Neural Evidence Accumulation in Expert Echolocators Researchers are increasingly focused on the neurological underpinnings of human echolocation, moving beyond simply demonstrating the skill to understanding how the brain constructs spatial awareness from sound. While the ability to navigate using tongue clicks and echoes has been known for some time, a recent study in eNeuro reveals that perception isn’t built on a single sound event but rather a progressive accumulation of acoustic evidence. Consistent with prior findings, expert echolocators demonstrated significantly improved directional accuracy, with one individual requiring only two click-echo pairs to determine an object’s position. “The study suggests that in human echolocation, spatial representations are constructed by progressively accumulating acoustic evidence over time, rather than through a single ‘optimal snapshot,’ ” Source: https://www.sciencenews.org/article/human-echolocation-blind-brain Tags: Dr. Donovan Dr. Donovan is a futurist and technology writer covering the quantum revolution. Where classical computers manipulate bits that are either on or off, quantum machines exploit superposition and entanglement to process information in ways that classical physics cannot. Dr. Donovan tracks the full quantum landscape: fault-tolerant computing, photonic and superconducting architectures, post-quantum cryptography, and the geopolitical race between nations and corporations to achieve quantum advantage. The decisions being made now, in research labs and government offices around the world, will determine who controls the most powerful computers ever built. Latest Posts by Dr. Donovan: Adam Back Says Quantum Risk to Crypto Not Imminent Now April 8, 2026 Fully programmable quantum computing with trapped-ions April 8, 2026 The Quantum Kid Podcast Gains 113,000 Subscribers, Webby Nomination Follows April 8, 2026