Assessment of KN95 Mask Filtering Degradation and Breathing Detection: A Pilot Study.

ABSTRACT: This study aims to monitor mask performance in operando using all-printed humidity sensor arrays based on BiFeO₃/BiOCl heterostructures. Two screen-printed 19-sensor arrays are fixed directly atop the mask, in order to analyze moisture levels in exhaled breath and extract performance indicators. This approach allows for an examination of the humidity saturation and absorption over time during operation. Accumulation of moisture within the mask can affect its performance, and factors like breath humidity, mask material, and ambient conditions influence this. Results show that the measured data follows an exponential decay, achieving correlation factors of over 0.9 for all tests. We also detect breathing differences through feature extraction, investigating the respiration rates a

SUBMITTER: Payette J 

PROVIDER: S-EPMC12736789 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature