The Atlantic recently took a look at, or rather listen to, auditory illusions. It is easy to forget sometimes that sight is not our only sense that can be fooled, but hearing and even touch can be fooled. This recent article discusses the use of mirrors to scratch one arm to relieve an itch on the other discuess one example of touch based illusion, which may have been inspired by the Rubber Hand Illusion. In that touch illusion researchers were able to convince people that a rubber hand was actually their own (learn more about it here).
One of the interesting things in The Atlantic’s article on auditory illusions is that several of the ear-foolers mentioned have similar sight based illusions. Running above is one of the examples listed on The Atlantic’s website, the Shephard Tone which is the auditory equivalent of the Penrose stairs, seen in the background.