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    Design Analysis and Human Tests of Foil-Based Wheezing Monitoring System for Asthma Detection

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    Final Manuscript (PDF).pdf
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    Type
    Article
    Authors
    Khan, Sherjeel M. cc
    Qaiser, Nadeem cc
    Shaikh, Sohail F. cc
    Hussain, Muhammad Mustafa cc
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Electrical Engineering Program
    Integrated Nanotechnology Lab
    Office of the VP
    Physical Science and Engineering (PSE) Division
    Date
    2019-12-30
    Online Publication Date
    2019-12-30
    Print Publication Date
    2020-01
    Permanent link to this record
    http://hdl.handle.net/10754/660552
    
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    Abstract
    We present a flexible acoustic sensor that has been designed to detect wheezing (a common symptom of asthma) while attached to the chest of a human. We adopted a parallel-plate capacitive structure using air as the dielectric material. The pressure (acoustic) waves from wheezing vibrate the top diaphragm of the structure, thereby changing the output capacitance. The sensor is designed in such a way that it resonates in the frequency range of wheezing (100-1000 Hz), which presents twofold benefits. The resonance results in large deflection of the diaphragm that eradicates the need for using signal amplifiers (used in microphones). Second, the design itself acts as a low-pass filter to reduce the effect of background noise, which mostly lies in the >1000-Hz frequency range. The resulting analog interface is minimal, and thus consumes less power and occupies less space. The sensor is made up of low-cost sustainable materials (aluminum foil) that greatly reduce the cost and complexity of manufacturing processes. A robust wheezing detection (matched filter) algorithm is used to identify different types of wheezing sounds among the noisy signals originating from the chest that lie in the same frequency range as wheezing. The sensor is connected to a smartphone via Bluetooth, enabling signal processing and further integration into digital medical electronic systems based on the Internet of Things (IoT). Bending, cyclic pressure, heat, and sweat tests are performed on the sensor to evaluate its performance in simulated real-life harsh conditions.
    Citation
    Khan, S. M., Qaiser, N., Shaikh, S. F., & Hussain, M. M. (2020). Design Analysis and Human Tests of Foil-Based Wheezing Monitoring System for Asthma Detection. IEEE Transactions on Electron Devices, 67(1), 249–257. doi:10.1109/ted.2019.2951580
    Publisher
    IEEE
    Journal
    IEEE Transactions on Electron Devices
    DOI
    10.1109/TED.2019.2951580
    Additional Links
    https://ieeexplore.ieee.org/document/8928940/
    https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8928940
    ae974a485f413a2113503eed53cd6c53
    10.1109/TED.2019.2951580
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Electrical Engineering Program; Integrated Nanotechnology Lab; Integrated Nanotechnology Lab; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

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