Validation of a Body-Conducted Sound Sensor for Respiratory Sound Monitoring and a Comparison with Several Sensors.
Sensors (Basel)
; 20(3)2020 Feb 10.
Article
in En
| MEDLINE
| ID: mdl-32050716
ABSTRACT
The ideal respiratory sound sensor exhibits high sensitivity, wide-band frequency characteristics, and excellent anti-noise properties. We investigated the body-conducted sound sensor (BCS) and verified its usefulness in respiratory sound monitoring through comparison with an air-coupled microphone (ACM) and acceleration sensor (B & K 8001). We conducted four experiments for comparison 1) estimation by equivalent circuit model of sensors and measurement by a sensitivity evaluation system; 2) measurement of tissue-borne sensitivity-to-air-noise sensitivity ratio (SRTA); 3) respiratory sound measurement through a simulator; and 4) actual respiratory sound measurement using human subjects. For 1), the simulation and measured values of all the sensors showed good agreement; BCS demonstrated sensitivity ~10 dB higher than ACM and higher sensitivity in the high-frequency segments compared with 8001. In 2), BCS showed high SRTA in the 600-1000 and 1200-2000-Hz frequency segments. In 3), BCS detected wheezes in the high-frequency segments of the respiratory sound. Finally, in 4), the sensors showed similar characteristics and features in the high-frequency segments as the simulators, where typical breathing sound detection was possible. BCS displayed a higher sensitivity and anti-noise property in high-frequency segments compared with the other sensors and is a useful respiratory sound sensor.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Respiratory Sounds
/
Monitoring, Physiologic
Type of study:
Prognostic_studies
Limits:
Humans
Language:
En
Journal:
Sensors (Basel)
Year:
2020
Document type:
Article
Affiliation country:
Japan
Publication country:
CH
/
SUIZA
/
SUÍÇA
/
SWITZERLAND