Spectral Envelope Analysis of Snoring Signals

M. Çavusoglu (Germany), M. Kamasak, T. Çiloglu, Y. Serinagaoglu, O. Erogul (Turkey)

Keywords

Spectral analysis, formant frequency, OSAS, snore

Abstract

In recent years, several studies have shown the relationship between snoring and obstructive sleep apnea syndrome (OSAS). Besides time domain analysis of snoring signal, the spectral features and shapes of snores can be used to discriminate simple snorers and OSAS patients. In this study, we propose a method to classify simple snorers and OSAS patients based on spectral envelope estimation of snoring signals. The formant frequencies and corresponding bandwidths are computed for both group, and the variation and consistency of the formant distributions are computed. A total of 1400 snoring episodes from 7 simple snorer and 7 OSAS patients were analyzed. Significant differences are found in the formant frequencies of both groups. The results are discussed from the view point of patho-physiological aspect.

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