Forget what Clarence told you: Every time a bell rings, a Columbia University professor analyzes it for three hours. This weekend, the sharp minds of the Society of Fellows in the Humanities present Listening In, Feeding Back, an experimental-music conference that gathers musicians and scholars to discuss the practice of listening as it relates to feedback. Lecture topics include auditory structures of car radios and polyrhythmic calls of West African toads; the Friday night concert features Alvin Lucier performing his famed electro-acoustic piece “I Am Sitting in a Room,” in which he chants those words, then plays back and re-records them until only the resonant frequencies remain. And now you can sit in that room! Meta.

Fri., Feb. 13, 3 & 8 p.m.; Sat., Feb. 14, 9 a.m., 2009