Despite sound being a rich source of information, computing devices with microphones do not leverage audio to glean useful insights about their physical and social context. For example, a smart speaker sitting on a kitchen countertop cannot figure out if it is in a kitchen, let alone know what a user is doing in a kitchen – a missed opportunity. In this work, we describe a novel, real-time, sound-based activity recognition system. 

http://www.gierad.com/assets/ubicoustics/ubicoustics.pdf