Detection of Covid-19 from Joint Time and Frequency Analysis of Speech, Breathing and Cough Audio

The distinct cough sounds produced by a variety of respiratory diseases suggest the potential for the development of a new class of audio bio-markers for the detection of COVID-19. Accurate audio biomarker-based COVID-19 tests would be inexpensive, readily scalable, and non-invasive. Audio biomarker screening could also be utilized in resource-limited settings prior to traditional diagnostic testing. Here we explore the possibility of leveraging three audio modalities: cough, breathing, and speech to determine COVID-19 status. We train a separate neural classification system on each modality, as well as a fused classification system on all three modalities together. Ablation studies are performed to understand the relationship between individual and collective performance of the modalities. Additionally, we analyze the extent to which temporal and spectral features contribute to COVID-19 status information contained in the audio signals.