| Combination of frequency and amplitude-modulated model for the synthesis of normal and wheezing sounds. | |
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MedLine Citation:
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PMID: 22045499 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Based on communication theory, this study proposes a model to synthesize normal and wheezing sounds. The model included five parts: the flow source as a transmitter, the frequency and amplitude-modulated (FM-AM) sounds, the accompanying noise as a modulator, the airway wall as a medium, and the microphone as a receiver. The hypothesis of modulation builds on that the deviation of frequency and amplitude of the sounds which cause from the deviation of collision speed of the air flow on the wall. The model was successful to simulate the normal breath and wheezing sounds. Furthermore, it provided a correct proof for the CORSA description, which indicates that the wheeze was contained in the domain frequency at 400 Hz, but a number of investigators have suggested that the range is actually between 80-1,600 Hz and 350-950 Hz by filter theory. This study modifies the signal source in Wodicka et al. model, and describes it in functional blocks. In fact, the design of the signal source base on the knowledge of the lung sound studies, especially the analysis of components in the frequency and time domains. We synthesized the required components to reproduce the lung sounds, and proposed a mechanism of wheeze which was examined by the computer simulation in the points of the system engineering view. |
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Authors:
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Bing-Yuh Lu; Huey-Dong Wu; Shyang-Rong Shih; Fok-Ching Chong; Meng-Lun Hsueh; Yu-Luen Chen |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-11-2 |
Journal Detail:
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Title: Australasian physical & engineering sciences in medicine / supported by the Australasian College of Physical Scientists in Medicine and the Australasian Association of Physical Sciences in Medicine Volume: - ISSN: 0158-9938 ISO Abbreviation: - Publication Date: 2011 Nov |
Date Detail:
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Created Date: 2011-11-2 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8208130 Medline TA: Australas Phys Eng Sci Med Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Information Management, Catholic St. Mary's Medicine, Nursing and Management College, Yilan, Taiwan, ROC. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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