Aaaaah, the 1-11, what an aircraft... No idea about airflow noises though!
Thanks for all the replies, very interesting to hear. Was on an RJ between MAD and MAN the other month and a Spanish family nearly jumped ship when they heard the flaps extending. I chuckled away in an "I'm a seasoned flyer and it doesn't scare me" type way as hinted by Noise Unit!
Ta ta.