The cheap, simple addition could help robots navigate and map hard-to-reach areas.
, Frederike Dümbgen and her team managed to combine a simple, cheap microphone and speaker array for both wheeled and flying robots.The cost-effective system essentially works exactly like bats’ sensory organs by first emitting short pings across a range of frequencies, then using the robot’s onboard microphone to record the sounds after bouncing off nearby walls.
According to their results, a stationary robot about the size of a tennis ball could map within two centimeters’ accuracy when placed half a meter away from a wall, while the flying drone could manage within eight meters. This is a relatively far cry from the accuracy of advanced camera and laser options, but a solid alternative for its comparative light weight and cost.
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