This is a a major insight of Peter Gamma after 4104 posts on www.petergamma.org. Richard R. Davidson’s brainscanner is a very complicated device: But we personally found very helpful without having it tested it yet is for instance an iWorx spirometer: https://ch.mathworks.com/matlabcentral/answers/401468-detect-beginning-and-end-of-inhalation-in-respiration-signal What Richard R. Davidson envisions for the future: ****************************************************************** Information for product sellers …