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Published in: Sleep and Breathing 1/2022

01-03-2022 | Sleep Apnea | Sleep Breathing Physiology and Disorders • Original Article

The acoustical and perceptual features of snore-related sounds in patients with obstructive sleep apnea sleeping with the dynamic mandibular advancement system MATRx plus®

Authors: Wolfgang Jacquet, Micheline M. D. De Meyer, John E. Remmers, Seyed Abdolali Zareian Jahromi, Dillon A. Hambrook, Luc A. M. Marks

Published in: Sleep and Breathing | Issue 1/2022

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Abstract

Purpose

The effect of snoring on the bed partner can be studied through the evaluation of in situ sound records by the bed partner or unspecialized raters as a proxy of real-life snoring perception. The aim was to characterize perceptual snore events through acoustical features in patients with obstructive sleep apnea (OSA) with an advanced mandibular position.

Methods

Thirty-minute sound samples of 29 patients with OSA were retrieved from overnight, in-home recordings of a study to validate the MATRx plus® dynamic mandibular advancement system. Three unspecialized raters identified sound events and classified them as noise, snore, or breathing. The raters provided ratings for classification certainty and annoyance. Data were analyzed with respect to respiratory phases, and annoyance.

Results

When subdividing perceptual events based on respiratory phase, the logarithm-transformed Mean Power, Spectral Centroid, and Snore Factor differed significantly between event types, although not substantially for the spectral centroid. The variability within event type was high and distributions suggested the presence of subpopulations. The general linear model (GLM) showed a significant patient effect. Inspiration segments occurred in 65% of snore events, expiration segments in 54%. The annoyance correlated with the logarithm of mean power (r = 0.48) and the Snore Factor (0.46).

Conclusion

Perceptual sound events identified by non-experts contain a non-negligible mixture of expiration and inspiration phases making the characterization through acoustical features complex. The present study reveals that subpopulations may exist, and patient-specific features need to be introduced.
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Metadata
Title
The acoustical and perceptual features of snore-related sounds in patients with obstructive sleep apnea sleeping with the dynamic mandibular advancement system MATRx plus®
Authors
Wolfgang Jacquet
Micheline M. D. De Meyer
John E. Remmers
Seyed Abdolali Zareian Jahromi
Dillon A. Hambrook
Luc A. M. Marks
Publication date
01-03-2022
Publisher
Springer International Publishing
Published in
Sleep and Breathing / Issue 1/2022
Print ISSN: 1520-9512
Electronic ISSN: 1522-1709
DOI
https://doi.org/10.1007/s11325-021-02392-2

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