In this interview, Andrew Carballeira interviews architectural acoustician William Cavanaugh. Cavanaugh discusses his family and childhood, his education at MIT, and experiences in the US Army. He describes his subsequent work as a consultant for Bolt, Beranek, and Newman designing acoustics facilities at Wright-Patterson Air Force Base and the Air Force Academy. Cavanaugh then describes his work as an independent consultant after leaving BBN, and his role in the formation of the National Council of Acoustical Consultants. Finally, Cavanaugh discusses his writing on acoustics and architecture, particularly Architectural Acoustics: Principles and Practice, which he co-edited with Gregory Tocci and Joseph Wilkes.