[saturdaysaint]

As an audiobook fanatic, my go to explanation for audio's effectiveness is that speaking and listening were the human race's primary way of transmitting and receiving information until very recently - the era of most of the human race being literate is a blink in the scale of evolutionary history.

A recent article on audiobooks (in the New Yorker, I think?) cited studies saying that audiobook readers had markedly better recall of physical descriptions in books, presumably because the visual processing centers of the brain aren't occupied with the task of reading itself.