Journal ArticleDOI
Automated Spectral Characterization of Wheezing in Asthmatic Children
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TLDR
Wheezing was found to be strongly dependent upon air flow, and generally followed the changes in pulmonary function as indicated by the forced expiratory volume at 1 s (FEV1).Abstract:
Breath sounds were recorded in normal and asthmatic children over the chest and trachea. The power spectra of the sounds were analyzed for peaks of high amplitude and high frequency as indications of wheezing. The percent of inspiration and expiration spent wheezing was used as an indication of the severity of bronchial obstruction. Wheezing was found to be strongly dependent upon air flow, and generally followed the changes in pulmonary function as indicated by the forced expiratory volume at 1 s (FEV1). The trachea was found to be a better location for analyzing wheezes than the lung.read more
Citations
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Book ChapterDOI
A Novel Approach to Wheeze Detection
TL;DR: A simple and robust algorithm for wheeze detection in respiratory sound spectra to be used for long-term monitoring and early stage assessment of asthma episode in children and the robustness of the algorithm enables wheezing detection in presence of noise and moving artifacts.
Dissertation
A framework for automated heart and lung sound analysis using a mobile telemedicine platform
TL;DR: This thesis explores the capture of cardiac and respiratory sounds on a mobile phone for analysis, with the long-term aim of developing intelligent algorithms for the detection of heart and respiratory-related problems.
Proceedings ArticleDOI
Analysis of Acoustic Features for Speech Sound Based Classification of Asthmatic and Healthy Subjects
TL;DR: Comparable accuracies using speech sound /o℧/ and non-speech exhale indicate the benefit of the rich acoustic features from ISCB.
Journal ArticleDOI
Auscultation revisited: the waveform and spectral characteristics of breath sounds during general anesthesia.
TL;DR: Digital audio technology was used to record and analyze the breath sounds of 14 healthy adult patients receiving general anesthesia with positive pressure ventilation to provide for improved monitoring and diagnostic capability during anesthesia and surgery.
Journal ArticleDOI
Analyse des sons auscultatoires pulmonaires
TL;DR: L’etude comporte une description des techniques de capture des sons auscultatoires, une caracterisation des marqueurs pathologiques pour lesquels des algorithmes de detection automatique ont ete developpes.
References
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Journal ArticleDOI
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S. V. Dawson,E. A. Elliott +1 more
TL;DR: The theoretical approach to the "waterfall effect" leads to selection of the analogy of constricted open-channel flow to apply to the elastic network of airway tubes, and results are derived for the case of negligible friction by use of the Bernoulli principle.
Journal ArticleDOI
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Journal ArticleDOI
Visual Lung-Sound Characterization by Time-Expanded Wave-Form Analysis
TL;DR: Time-expanded wave form analysis provides reproducible visual displays that allow documentation of the differentiating features of lung sounds and enhances the diagnostic utility of the sounds.
Journal ArticleDOI
Relationship of Wheezing to the Severity of Obstruction in Asthma
Chang S. Shim,M. Henry Williams +1 more
TL;DR: Although characterization of wheezing has a general relationship to the severity of airway obstruction, an objective measurement of expiratory flow rate is necessary for the evaluation of each patient's condition.