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. 2020 Aug;12(8):4476–4495. doi: 10.21037/jtd-20-804

Figure 9.

Figure 9

A full night view of a Firefly app recording, showing (from top to bottom): estimated respiration rate in breaths per minute, relative activity level, respiratory effort (derived from respiratory envelope), and relative acoustic level (filtered). Wake, SDB, and snore events are overlaid.