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International Journal of Fluid Mechanics Research

年間 6 号発行

ISSN 印刷: 2152-5102

ISSN オンライン: 2152-5110

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 1.1 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 1.3 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.0002 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.33 SJR: 0.256 SNIP: 0.49 CiteScore™:: 2.4 H-Index: 23

Indexed in

Frequency Distortions Introduced by Contact Sensors in Single and Two-Channel Sensing of Respiration Noise

巻 23, 発行 3&4, 1996, pp. 278-287
DOI: 10.1615/InterJFluidMechRes.v23.i3-4.110
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要約

Aspects of designing multi-channel systems for electronic recording of respiration noise from the surface of the chest cavity are examined. The suggested mathematical model is employed for calculating the frequency curves of an output signal from single- and two-channel respiration-noise pickups. It is established that at frequencies below 500 Hz chestpiece pickups whose specific mechanical impedance exceeds the specific impedance of the chest-cavity surface (heavy chestpieces) markedly affect the vibrations of the contact spot as compared with a the pickup-free chest cavity. The interaction of contact pickups with the surface wave in two-chestpiece sensing of respiration noise is investigated. It is shown that signals from closely-spaced heavy chestpieces significantly affect one another. This distorts the frequency curve of the received signal as compared with the case of single-chestpiece sensing.

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