@article{xu:imwut2022c,
  title={PPGface: Like What You Are Watching? Earphones Can" Feel" Your Facial Expressions},
  author={Choi, Seokmin and Gao, Yang and Jin, Yincheng and Kim, Se jun and Li, Jiyang and Xu, Wenyao and Jin, Zhanpeng},
  journal={Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies},
  volume={6},
  number={2},
  pages={1--32},
  year={2022},
  publisher={ACM New York, NY, USA}
}