This mysterious (and scary) audio track is actually radio waves ... pinging the robot's body with debris. However, it sounds more like a creature rapping at the window sill or scurrying across ...
But she was recently spooked when she said she heard “whispering” noises coming from her appliance late at night. “Ewww this is so creepy, does this happen to anyone else?!?” ...
Keep your ears open this season for spooky things that make creepy noises from which we get imitative, soundalike words. After all, onomatopoeia could be lurking around every corner.