Experiment 1- Cane test
Subject A turns around while subject B places the binder in a random location
Subject A turns around and swipes the stick from side to side to detect the binder from her surroundings
Subject A locates the object and estimates and measures the distance from the starting point to the binder's location. She compares the estimate and the real measurement at the end of the experiment.
Experiment 3- The magnified voice clicks
Subject B is waiting for Subject A to tell Subject to turn around and close her eyes.
Subject B closes her eyes as Subject A places the object somewhere random in the staircase. Subject A will then after turn on the recoding of the clicks for Subject B.
Subject B is using echolocation to sense the object Subject A has randomly placed. Subject B is then pointing to the direction of the object.