Terahertz Remote Respiration Rate Monitoring

Terahertz technology positions itself as a promising alternative to conventional vital signs measurement methods due to its unique characteristics, making it particularly suitable for non-contact measurements in free space. In this work, the influence of different frequency bands and clothing on the accuracy of respiration rate measurements is analyzed, using a motion-based method that utilizes amplitude information. The highest accuracy is obtained in the lowest studied frequency band of 220 GHz − 330 GHz, with a mean absolute error of 0.34 rpm. Notably, clothing does not impede the measurements. The results demonstrate the capability of terahertz technology to effectively detect and monitor respiration rate.