Assignment:
Listen to the podcasts "Introduction and why use audio for learning?" and "Audio has limitations but lean back and enjoy it" where Clive Shepard discusses the importance of using audio in e-learning: https://kineo.com/e-learning-interviews/clive-shepherd-interview.html
Why use audio for e-learning? Going one step further, why should extraneous audio be avoided? What are the psychological reasons for avoiding extraneous audio?