Core body temperature (CBT) is one of the critical yet under-explored phenomena in the context of stress detection. Several CBT measurement methods exist, but they are often limited in continuous CBT monitoring. Furthermore, how continuous CBT can be used to model acute stress is little explored. We address these challenges by conducting an in-lab controlled study with 97 participants who participated in baseline and stress-inducing tasks while wearing prototype earbuds capable of collecting CBT. We found that accounting for changes from individual baselines in CBT results is acute stress detection with 94.88% accuracy and 94.4% F1-score, which is 29.31% and 26.07% higher in terms of accuracy and F1-score, respectively, compared to generalized features.

https://ieeexplore.ieee.org/abstract/document/10447599