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This paper reports on a pilot study of acoustic properties of respiratory sounds in relation to obstructive sleep apnea (OSA). Data were breathing sounds of 60 individuals in three groups of non-, Moderate and Severe OSA using the apnea/hypopnea index (AHI) (20 in each group). The sounds power spectral energy and phase responses were calculated for each(More)
Screening for obstructive sleep apnea (OSA) disorder during wakefulness is challenging. In this paper, we present a set of tracheal breathing sounds characteristics with classification power for separating individuals with apnea/hypopnea index (AHI) ≥ 10 (OSA group) from those with AHI ≤ 5 (non-OSA group) during wakefulness. Tracheal breathing sound signals(More)
This erratum is to correct the numbers presented in the last sentence of Section ''B. Preprocessing''. The sentence with corrected numbers is: ''Out of the data in the two groups of OSA and non-OSA, we used a subset of randomly selected 105 subjects (50 non-OSA and 55 OSA) for investigating the characteristic features with most differences between the two(More)
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