A Lightweight and Inexpensive In-ear Sensing System For Automatic Whole-night Sleep Stage Monitoring

@article{Nguyen2016ALA,
  title={A Lightweight and Inexpensive In-ear Sensing System For Automatic Whole-night Sleep Stage Monitoring},
  author={Anh Nguyen and Raghda Alqurashi and Zohreh Raghebi and Farnoush Banaei Kashani and Ann C. Halbower and Tam N. Vu},
  journal={Proceedings of the 14th ACM Conference on Embedded Network Sensor Systems CD-ROM},
  year={2016}
}
This paper introduces LIBS, a light-weight and inexpensive wearable sensing system, that can capture electrical activities of human brain, eyes, and facial muscles with two pairs of custom-built flexible electrodes each of which is embedded on an off-the-shelf foam earplug. A supervised non-negative matrix factorization algorithm to adaptively analyze and extract these bioelectrical signals from a single mixed in-ear channel collected by the sensor is also proposed. While LIBS can enable a wide… 
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