Human hearing is very prone to priming: if you know what to expect, you can easily hear it even if the original sound is quite garbled. My favorite demo is by

Human hearing is very prone to priming: if you know what to expect, you can easily hear it even if the original sound is quite garbled. My favorite demo is by Michael Shermer (after 9 minutes): https://www.ted.com/talks/michael_shermer_why_people_believe_weird_things https://www.ted.com/talks/michael_shermer_why_people_believe...