Monitoring eating habits using a piezoelectric sensor-based necklace

Haik Kalantarian*, Nabil Alshurafa, Tuan Le, Majid Sarrafzadeh

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

132 Scopus citations


Maintaining appropriate levels of food intake and developing regularity in eating habits is crucial to weight loss and the preservation of a healthy lifestyle. Moreover, awareness of eating habits is an important step towards portion control and weight loss. In this paper, we introduce a novel food-intake monitoring system based around a wearable wireless-enabled necklace.The proposed necklace includes an embedded piezoelectric sensor, small Arduino-compatible microcontroller, Bluetooth LE transceiver, and Lithium-Polymer battery. Motion in the throat is captured and transmitted to a mobile application for processing and user guidance. Results from data collected from 30 subjects indicate that it is possible to detect solid and liquid foods, with an F-measure of 0.837 and 0.864, respectively, using a naive Bayes classifier. Furthermore, identification of extraneous motions such as head turns and walking are shown to significantly reduce the false positive rate of swallow detection.

Original languageEnglish (US)
Pages (from-to)46-55
Number of pages10
JournalComputers in Biology and Medicine
StatePublished - Mar 1 2015


  • Necklace
  • Nutrition
  • Piezoelectric sensor
  • Wireless health

ASJC Scopus subject areas

  • Computer Science Applications
  • Health Informatics


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