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Wearable Ubiquitous Technol."],"published-print":{"date-parts":[[2018,3,26]]},"abstract":"<jats:p>Monitoring of in-person conversations has largely been done using acoustic sensors. In this paper, we propose a new method to detect moment-by-moment conversation episodes by analyzing breathing patterns captured by a mobile respiration sensor. Since breathing is affected by physical and cognitive activities, we develop a comprehensive method for cleaning, screening, and analyzing noisy respiration data captured in the field environment at individual breath cycle level. Using training data collected from a speech dynamics lab study with 12 participants, we show that our algorithm can identify each respiration cycle with 96.34% accuracy even in presence of walking. We present a Conditional Random Field, Context-Free Grammar (CRF-CFG) based conversation model, called rConverse, to classify respiration cycles into speech or non-speech, and subsequently infer conversation episodes. Our model achieves 82.7% accuracy for speech\/non-speech classification and it identifies conversation episodes with 95.9% accuracy on lab data using a leave-one-subject-out cross-validation. Finally, the system is validated against audio ground-truth in a field study with 32 participants. rConverse identifies conversation episodes with 71.7% accuracy on 254 hours of field data. For comparison, the accuracy from a high-quality audio-recorder on the same data is 71.9%.<\/jats:p>","DOI":"10.1145\/3191734","type":"journal-article","created":{"date-parts":[[2018,3,27]],"date-time":"2018-03-27T12:06:45Z","timestamp":1522152405000},"page":"1-27","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":19,"title":["rConverse"],"prefix":"10.1145","volume":"2","author":[{"given":"Rummana","family":"Bari","sequence":"first","affiliation":[{"name":"University of Memphis, Electrical and Computer Engineering, Memphis, TN, USA"}]},{"given":"Roy J.","family":"Adams","sequence":"additional","affiliation":[{"name":"University of Massachusetts Amherst, Computer Science, Amherst, MA, USA"}]},{"given":"Md. 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