Classification of the excitation location of snore sounds in the upper airway by acoustic multifeature analysis

Kun Qian, Christoph Janott, Vedhas Pandit, Zixing Zhang, Clemens Heiser, Winfried Hohenhorst, Michael Herzog, Werner Hemmert, Björn Schuller

Research output: Contribution to journalArticlepeer-review

59 Scopus citations

Abstract

Objective: Obstructive sleep apnea (OSA) is a serious chronic disease and a risk factor for cardiovascular diseases. Snoring is a typical symptom of OSA patients. Knowledge of the origin of obstruction and vibration within the upper airways is essential for a targeted surgical approach. Aim of this paper is to systematically compare different acoustic features, and classifiers for their performance in the classification of the excitation location of snore sounds. Methods: Snore sounds from 40 male patients have been recorded during drug-induced sleep endoscopy, and categorized by Ear, Nose & Throat (ENT) experts. Crest Factor, fundamental frequency, spectral frequency features, subband energy ratio, mel-scale frequency cepstral coefficients, empirical mode decomposition-based features, and wavelet energy features have been extracted and fed into several classifiers. Using the ReliefF algorithm, features have been ranked and the selected feature subsets have been tested with the same classifiers. Results: A fusion of all features after a ReliefF feature selection step in combination with a random forests classifier showed the best classification results of 78% unweighted average recall by subject independent validation. Conclusion: Multifeature analysis is a promising means to help identify the anatomical mechanisms of snore sound generation in individual subjects. Significance: This paper describes a novel ap- proach for the machine-based multifeature classification of the excitation location of snore sounds in the upper airway.

Original languageEnglish
Article number7605472
Pages (from-to)1731-1741
Number of pages11
JournalIEEE Transactions on Biomedical Engineering
Volume64
Issue number8
DOIs
StatePublished - Aug 2017

Keywords

  • Drug-induced sleep endoscopy (DISE)
  • Multifeature analysis
  • Obstructive sleep apnea (OSA)
  • Snore sound classification

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