From the linked study, those spectrograms seem to represent a frequency of nostril breathing versus... mouth breathing?
The automatic analysis of the source data’s thermal video capture seems to look for hot nostril flares, from breathing through the nose only, as a reliable measure of relaxed respiratory rate? The respiratory rate is either assessed as a measurable number, ranked as a percentile, high or low, or indeterminate/chaotic which is then presumed as correlated with elevated mental activity?
Note that this spectrogram is not chemical analysis of respiratory exhaust from exhaled gases. It’s not mass spectrometry, searching for CO2 and water vapor content as an indicator of metabolic respiration, which is what the title almost sounds like it could be about, without careful reading.
The study then goes on to state that other sensors (air flow meters, pressure sensitive chest straps) could be used to extract respiratory rate over time, and construct the same data interchangably. I’m not so sure that’s true, but clearly the goal here is passive reads, probably for retrospective lie detector types of analysis. Seems like a presuptive effort at precrime.
The automatic analysis of the source data’s thermal video capture seems to look for hot nostril flares, from breathing through the nose only, as a reliable measure of relaxed respiratory rate? The respiratory rate is either assessed as a measurable number, ranked as a percentile, high or low, or indeterminate/chaotic which is then presumed as correlated with elevated mental activity?
Note that this spectrogram is not chemical analysis of respiratory exhaust from exhaled gases. It’s not mass spectrometry, searching for CO2 and water vapor content as an indicator of metabolic respiration, which is what the title almost sounds like it could be about, without careful reading.
The study then goes on to state that other sensors (air flow meters, pressure sensitive chest straps) could be used to extract respiratory rate over time, and construct the same data interchangably. I’m not so sure that’s true, but clearly the goal here is passive reads, probably for retrospective lie detector types of analysis. Seems like a presuptive effort at precrime.