DocumentCode :
2665353
Title :
Monitoring of breath sound under daily environment by ceiling dome microphone
Author :
Nishida, Yoshifumi ; Hori, Toshio ; Suehiro, Takashi ; Hirai, Shigeoki
Author_Institution :
Intelligent Syst. Div., Electrotech. Lab., Japan
Volume :
3
fYear :
2000
fDate :
2000
Firstpage :
1822
Abstract :
This paper proposes a new method for monitoring normal breath sounds in a daily environment where many kinds of noises exist. In a typical conventional breath monitor, a thermistor, an accelerometer, or a contact-type microphone must be attached directly to a person´s body such as a part around the nose and the mouth, or a part over the chest wall and the trachea. This paper focuses on key issues stemming from a factor of the environment: extraction of breath sounds from sensor signals contaminated by environmental noise; and realization of a monitoring system suitable for our homes. Features of normal breath sounds are clarified by frequency analysis. Based on the features, a method for extracting normal breath sounds is discussed. This paper also describes a ceiling dome microphone which is a kind of a parabolic sound concentrator. It realizes a function of detecting normal breathing sounds with high sensitivity while keeping a room´s appearance natural. The gain obtained by such a concentrator is analyzed theoretically from the acoustic point of view. Experimental results proved the feasibility of the proposed method
Keywords :
acoustic signal processing; medical signal processing; microphones; noise pollution; patient monitoring; pneumodynamics; accelerometer; acoustic signal processing; breath sound monitoring; ceiling dome microphone; contact-type microphone; environmental noise; experimental results; frequency analysis; home health care; parabolic sound concentrator; sensor signals; thermistor; Accelerometers; Acoustic noise; Acoustic sensors; Microphones; Monitoring; Mouth; Nose; Sensor systems; Thermistors; Working environment noise;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Systems, Man, and Cybernetics, 2000 IEEE International Conference on
Conference_Location :
Nashville, TN
ISSN :
1062-922X
Print_ISBN :
0-7803-6583-6
Type :
conf
DOI :
10.1109/ICSMC.2000.886374
Filename :
886374
Link To Document :
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