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INFLUENCE OF AERIAL POLLUTANTS ON OBJECTIVE COUGH-SOUND RECOGNITION
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: Pp. 001-008 in Swine Housings II Proceedings of the 12-15 October 2003 Conference (Research Triangle Park, North Carolina USA), Publication Date 12 October 2003. 701P1303.(doi:10.13031/2013.15462)
Authors: A. Van Hirtum, and D. Berckmans
Keywords: Air quality, Sound-analysis, Biomarker, Respiratory health and comfort, Personalized and room-ventilation
The relation of air quality and respiratory health and comfort in man and animal is widely
shown. In general a state of respiratory discomfort in every day indoor and outdoor life is
prevailed by an increase in acoustic audible symptoms. The general concept of sound-analysis as
objective non-invasive biomarker for aerial pollution is studied on free field cough-sound of 12
Belgian Landrace piglets. A citric acid induced cough-sound recognition-algorithm with
recognition rate of 95% is applied to cough-sounds registered in presence of distinct types of
aerial pollutants: irritating gas (ammonia), respirable particulars (dust) and climate factors
(temperature). The recognition-performance for all aerial pollutants obtained > 90% and
maintained 94% on average. Therefore it is concluded that sound-analysis allows an effective
biomarker for all 3 types of aerial pollution. The generality of the biomarker is hypothesized to
be due to the common mechanism involved in protective coughing which will stand as long as no
physical changes to the state of the respiratory system occur. As a consequence it is suggested to
imply sound-analysis as a biomarker for the respiratory state into ventilation-control to improve
respiratory comfort affected by aerial pollutants.
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