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Humans Can Detect Buried Objects Without Touch, Study Finds

Experiments with sand show fingertips perceive granular “reflections” that signal hidden shapes.

Overview

  • Researchers at Queen Mary University of London and University College London report evidence of human remote touch in sand-based tests presented at the IEEE International Conference on Development and Learning.
  • Participants located a concealed cube before contact with 70.7% precision within the model-defined detectable range.
  • A UR5 robot with a tactile sensor and an LSTM model sometimes sensed at greater distances but produced more false positives, yielding about 40% overall precision.
  • Physical modeling indicates human sensitivity to minute sand displacements approaches the theoretical threshold for detecting mechanical reflections in granular media.
  • The team highlights applications for assistive tools, archaeological probing, and exploration of granular terrains such as Martian soil.