Figure 6.

(a) Sensor was placed 5 cm away from nose under ambient atmosphere without any additional flow control or sensing chamber setup. Human breath response to (b) slow, (c) normal, and (d) fast breathing under ambient atmosphere. (e) The image of human wearing sensor-embedded mask. Human breath responses curve to (f) slow, (g) normal, and (h) fast breathing after wearing mask (sensor 1 cm far from nose). (i) Image of ultra-flexible sensor embedded on smart mask. (j) The data of continuous monitoring of breath with different breathing modes. (k) The respiratory rate data for slow, normal, and fast breath. (l) Duration time of exhalation and inhalation.