A medical instrument for acquisition and analysis of phono-cardiac signals is described in the paper. The proposed system is based on an electronic stethoscope with enhanced performances in environmental noise reduction, achieved by means of two microphones whose signals are combined by an adaptive algorithm. A software tool able to reproduce, visualize and analyze cardiac sounds completes the system. The recorded data and the results of the analysis are stored in a database to build up clinical history of patients and to allow further consultations. A demonstrator of the tool has been realized. Experimental results show significant improvements in noise reduction, when the filtering algorithm is applied. These features make the instrument suited: i) to be employed in very noisy environment, such as ambulance, ii) to help physicians with acoustic diseases, increasing the sound level and showing the phonocardiogram, and iii) to retrieve basic information on the cardiac activity.

A new digital stethoscope with environmental noise cancellation / F. Belloni, D. Della Giustina, M. Riva, M. Malcangi - In: Advances in Mathematical and Computational Methods / [a cura di] L. Rogozea. - Stevens Point, USA : WSEAS Press, 2010. - ISBN 9789604742431. - pp. 169-174 (( Intervento presentato al 12. convegno WSEAS International Conference on Mathematical and Computational Methods in Science and Engineering (MACMESE'10) tenutosi a Faro nel 2010.

A new digital stethoscope with environmental noise cancellation

F. Belloni
Primo
;
D. Della Giustina
Secondo
;
M. Riva
Penultimo
;
M. Malcangi
Ultimo
2010

Abstract

A medical instrument for acquisition and analysis of phono-cardiac signals is described in the paper. The proposed system is based on an electronic stethoscope with enhanced performances in environmental noise reduction, achieved by means of two microphones whose signals are combined by an adaptive algorithm. A software tool able to reproduce, visualize and analyze cardiac sounds completes the system. The recorded data and the results of the analysis are stored in a database to build up clinical history of patients and to allow further consultations. A demonstrator of the tool has been realized. Experimental results show significant improvements in noise reduction, when the filtering algorithm is applied. These features make the instrument suited: i) to be employed in very noisy environment, such as ambulance, ii) to help physicians with acoustic diseases, increasing the sound level and showing the phonocardiogram, and iii) to retrieve basic information on the cardiac activity.
Adaptive filters; Analysis cardiac sounds; Biomedical signal analysis; Electronic stethoscope; System identification
Settore INF/01 - Informatica
University of Algarve
Centro de Investigacao Sobre
Book Part (author)
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/147872
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