
1) Auditory illusion
Found on
https://www.crosswordclues.com/clue/pareidolia

Pareidolia (ə {respell|parr-i|DOH|lee-ə}) is a psychological phenomenon involving a vague and random stimulus (often an image or sound) being perceived as significant. Common examples include seeing images of animals or faces in clouds, the man in the moon or the Moon rabbit, and hearing hidden messages on records when played in reverse. The wor...
Found on
http://en.wikipedia.org/wiki/Pareidolia

vivid imagery that occurs whilst looking at a poorly structured background
Found on
http://www.encyclo.co.uk/local/22394
No exact match found.