Obstructive sleep apnea-hypopnea syndrome screening method and device thereof
A technology for sleep apnea and hypopnea, applied in medical science, sensors, diagnostic recording/measurement, etc.
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[0049] In the OSAHS screening system, for a specific OSAHS snorer, the state of the upper airway is different when producing normal snoring and abnormal snoring, and the upper airway is in an obstructed state when producing abnormal snoring. The corresponding frequency distribution ranges of the first formant parameters reflecting the width of the upper airway are also different. According to this characteristic of the formant parameter, a normal snoring segment can be distinguished from an abnormal snoring segment by setting a formant threshold. Simply put, a formant threshold is used to distinguish the first formant frequency of normal snoring and abnormal snoring, so as to achieve the purpose of distinguishing two different snoring sounds. For normal snoring, the first formant frequency is at a lower level For the abnormal snoring sound segment, its first formant frequency is in a higher frequency band, so the difference between the first formant frequency of the two can be...
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